Lemna Black & White Stock Photos
RFT5YT07–A picture, that's showing Duckweed. It belongs to Araceae family. This is common duckweed, Lemna. Lemna is a genus of free-floating aquatic plants, vi
RFT5X58C–A picture shows Araceae,Lemnaceae,Bromeliaceae,Commelinaceae Orders. 1 arisaema,spadix 2 arum spadix 3 lemna 3a spathe 4 bromelia flower 5 ananas 5a f
RMRE3EC6–. Practical text-book of plant physiology. Plant physiology. 226 NUTRITIVE METABOLISM amount is measured out for refilling the jars, since some of the calcium salts used are only sparingly soluble, and will collect at the bottom of the vessel. Cuttings of Salix, Begonia, or any convenient plant may be used instead of seedlings. Half of the length of the cutting should be immersed in the solution, and it should be cared for otherwise, as a seedling. Successful water cultures of aquatic plants have been carried out with Lemna and Philotria, but solutions of less concentration should be used. A d
RMMXCF1W–. English: Germination of Lemna gibba . 1830. W.J. Hooker (d. 1865) 367 Lemna gibba germination BM
RMRDYHYF–. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. THE ENDOSPERM ie: observed. In Lemna Caldwell24 states that often the polar nuclei do not fuse, in which case he observed that the micro- pylar polar produced some free endosperm nuclei, and probably the antipodal one also. In Limnocharis, one of the Alismaceae, there is also no fusion (Hall 50), since no antipodal polar nucleus is formed, and all the endosperm, which eventually fills the sac, is derived from the micropylar polar nucleus. In Casuarina, according to Trenb,12 there are no antipoda
RMMWG736–. English: Germination of Lemna gibba . 1830. W.J. Hooker (d. 1865) 366 Lemna gibba germination BM
RMPG2MC0–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. DISPERSAL BY WATER. 805 called Pediastrum, which is closely related to the Water-net, and of which one species is shown in figs. 370 ^â ''â¢s. p. 640. The distribution of bud or sprout-like offshoots is seen especially in the Duck- weeds, Alismacese, Potamogetons, Utriculariaceffi, Droseraceee, and Primulacese. Most of the Duckweeds (e.g. Lemna polyrrhiza and L. arrhiza), which float during the summer on the surface of still water, towards the autumn form organs on their flattened stems which become
RMRDNE9N–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. Fig. 97.—Position of the Chlorophyll-granules in the cells of the Ivy-leaved Duckweed (Lemna trisulca). i In darkness, s in direct sunlight. » In diffuse light. tries under all circumstances to obtain this definite amount. When weakly illuminated, chlorophyll-granules maintain a shape and position in consequence of which they present the largest possible surface to the light; when strongly illumi- nated, they assume a shape and position by which the smallest possible surface is so exposed. These proc
RMMYJY58–. English: Germination of Lemna gibba . 1830. W.J. Hooker (d. 1865) 319 Lemna gibba germination BM
RMPG428W–. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. FEESH-WATEE AQUAEIA.. Fig. 69. Greater Duckweed (Lemna polyrhiza). not at all in Britain. In -winter ttey sink to the bottom of tte water. The Greater Duck- weed (Lemna polyrhiza) (Fig. 69) is rather larger than the rest of the duckweeds. Its fronds or leaves are nearly round, about ^in. in diameter, thiokish, dark green above and pur- ple below, each frond having a number of
RMRPXFRJ–. Text-book of botany, morphological and physiological. Botany. 6zz PHANEROGAMS. produces only one or a pair of opposite lateral shoots, and the branching is therefore distinctly cymose, sympodial, or, as in Lemna trisulca, dichasial. Besides the formation of shoots by the branching of the axis, adventitious shoots also sometimes occur on leaves which perform the function of gemmae ; as for instance on the margins of the leaves of Hyacinthus Pouzolsii and some Orchids (Doll, Flora, p. 348)1. The large gemmae which appear very regularly at the point of junction of the leaf-stalk and lamina, and
RMPG428P–. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. Fig. 69. Greater Duckweed (Lemna polyrhiza). not at all in Britain. In -winter ttey sink to the bottom of tte water. The Greater Duck- weed (Lemna polyrhiza) (Fig. 69) is rather larger than the rest of the duckweeds. Its fronds or leaves are nearly round, about ^in. in diameter, thiokish, dark green above and pur- ple below, each frond having a number of little roots or fibre
RMRDTB52–. My garden, its plan and culture together with a general description of its geology, botany, and natural history. Gardening. Fig. 777.—Lesser Dueliweed. Those weeds already described, taken together, form a choice flower- garden of themselves, ay, and contain species of greater beauty and of greater variety than are to be found in some well-dug, well-hoed, and well-raked artificial flower-gardens,—continually interfered with by the gardener's art. Besides these exquisite flowering weeds, there are others, interesting but unpretending. We have two Duckweeds in our water,—the Lemna trisulca, or
RMPG2536–. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. Fig. 292.—Duckweed. Watercress, Nasturtium officinale. Stoneworts, Chara and Nitella (several species of each). Frog-spittle or water-silk, Spirogira. A small quantity of duckweed, Lemna (Fig. 292), placed on the surface of the water adds to the beauty of an aquarium. When it is necessary to add water to an aqua- rium on account of loss by evaporation, rain wa- ter should be used to prevent an undue ac- cumulation of the mineral matter held in s
RMRDGWF7–. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. Fig. 69. Greater Duckweed (Lemna polyrhiza). not at all in Britain. In -winter ttey sink to the bottom of tte water. The Greater Duck- weed (Lemna polyrhiza) (Fig. 69) is rather larger than the rest of the duckweeds. Its fronds or leaves are nearly round, about ^in. in diameter, thiokish, dark green above and pur- ple below, each frond having a number of little roots or fibre
RMPG3R3J–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. CHLOROCHYTRIUM. 549 Chlorochytrium lemnae Cohn.i The zygozoospores have four cilia and swarm for a short time in water. On plants of Lemna trimdca, the ciliated end becomes applied to the epidermis at the place where two cells are in contact, the zoospore becomes spherical, forms a membrane, and comes to rest (Fig. 324). It remains resting for a day or two, and assimilates so that a starch-grain is formed inside it.
RMRDY743–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 945. Lemna gibba.. 946. Lemna polyrrhiza. 943. Lemna trisulca.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMPG253C–. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. THE BREEDING OF INSECTS. 331. Fig. 292.—Duckweed. Watercress, Nasturtium officinale. Stoneworts, Chara and Nitella (several species of each). Frog-spittle or water-silk, Spirogira. A small quantity of duckweed, Lemna (Fig. 292), placed on the surface of the water adds to the beauty of an aquarium. When it is necessary to add water to an aqua- rium on account of loss by evaporation, rain wa- ter should be used to prevent an undue ac- cumulation o
RMRDG9XT–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. DISPERSAL BY WATER. 805 called Pediastrum, which is closely related to the Water-net, and of which one species is shown in figs. 370 ^â ''â¢s. p. 640. The distribution of bud or sprout-like offshoots is seen especially in the Duck- weeds, Alismacese, Potamogetons, Utriculariaceffi, Droseraceee, and Primulacese. Most of the Duckweeds (e.g. Lemna polyrrhiza and L. arrhiza), which float during the summer on the surface of still water, towards the autumn form organs on their flattened stems which become
![. Heredity and evolution in plants. Heredity; Plants. EVOLUTION of Woljfia possess still simpler bodies, somewhat globose, with neither roots, veins, nor other organs, except flowers; even flowers are unknown in some species {e.g., Wolffia populifera, Fig. 44). Wolffia punctata measures only 0.5-0.8 mm. long. The plants are fittingly described in the manuals as "minute, alga-like grains," floating on or ecr^. Fig. 44.—Lemnaceae. e, /, Wolffia papuUfera. modified.) a, b, c, Lemna Irisiilca; d, Wolffia punctata; (Redrawn from Britton and Brown, slightly just beneath the surface of stil Stock Photo](https://c8.alamy.com/comp/PG2RGA/heredity-and-evolution-in-plants-heredity-plants-evolution-of-woljfia-possess-still-simpler-bodies-somewhat-globose-with-neither-roots-veins-nor-other-organs-except-flowers-even-flowers-are-unknown-in-some-species-eg-wolffia-populifera-fig-44-wolffia-punctata-measures-only-05-08-mm-long-the-plants-are-fittingly-described-in-the-manuals-as-quotminute-alga-like-grainsquot-floating-on-or-ecr-fig-44lemnaceae-e-wolffia-papuufera-modified-a-b-c-lemna-irisiilca-d-wolffia-punctata-redrawn-from-britton-and-brown-slightly-just-beneath-the-surface-of-stil-PG2RGA.jpg ". Heredity and evolution in plants. Heredity; Plants. EVOLUTION of Woljfia possess still simpler bodies, somewhat globose, with neither roots, veins, nor other organs, except flowers; even flowers are unknown in some species {e.g., Wolffia populifera, Fig. 44). Wolffia punctata measures only 0.5-0.8 mm. long. The plants are fittingly described in the manuals as "minute, alga-like grains," floating on or ecr^. Fig. 44.—Lemnaceae. e, /, Wolffia papuUfera. modified.) a, b, c, Lemna Irisiilca; d, Wolffia punctata; (Redrawn from Britton and Brown, slightly just beneath the surface of stil Stock Photo")
RMPG2RGA–. Heredity and evolution in plants. Heredity; Plants. EVOLUTION of Woljfia possess still simpler bodies, somewhat globose, with neither roots, veins, nor other organs, except flowers; even flowers are unknown in some species {e.g., Wolffia populifera, Fig. 44). Wolffia punctata measures only 0.5-0.8 mm. long. The plants are fittingly described in the manuals as "minute, alga-like grains," floating on or ecr^. Fig. 44.—Lemnaceae. e, /, Wolffia papuUfera. modified.) a, b, c, Lemna Irisiilca; d, Wolffia punctata; (Redrawn from Britton and Brown, slightly just beneath the surface of stil
RMRDHGNT–. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. FEESH-WATEE AQUAEIA.. Fig. 69. Greater Duckweed (Lemna polyrhiza). not at all in Britain. In -winter ttey sink to the bottom of tte water. The Greater Duck- weed (Lemna polyrhiza) (Fig. 69) is rather larger than the rest of the duckweeds. Its fronds or leaves are nearly round, about ^in. in diameter, thiokish, dark green above and pur- ple below, each frond having a number of
RMRDY994–. Botany of the living plant. Botany. V.irying positions taken by chlorophyll grains in the cells of Lemna irisulca under illumination of different intensity. T, in diffuse daylight. 5, in direct sunlight. .V, at night. The arrows indicate the direction of the light. (After Stahl.) S.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan and co. , limited
RMRDTGA2–. Elementary botany. Botany. CHAPTER XLVI. FURTHER STUDIES ON NUTRITION. 593. In our former studies on nutrition we found that such plants as the corn, pea, bean, etc., obtain their liquid food through the medium of root hairs. The liverworts and mosses obtain theirs largely through similar outgrowths, the rhizoids, while a majority of the algse, being bathed on all sides by water, absorb liquid food through any part of the surface. We will find it instructive to study some of the different ways in which diverse plants obtain their liquid food. 594. Nutrition in lemna.—A water plant is illustr
![. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Lemna gibba L. Gibbous Duckweed. Fig. 1126. Lemna gibba L. Sp. PI. 970. 1753. Thallus slightly unsymmetrical, obovate or short-obovate, 14"—3" long, thickish or more or less strongly gibbous be- neath, short-stalked when young, soon separating, provided with stomata which are sparse beneath, obscurely 3-5-nerved; rootcap mostly short-pointed, rarely l Stock Photo](https://c8.alamy.com/comp/RDJC3X/an-illustrated-flora-of-the-northern-united-states-canada-and-the-british-possessions-from-newfoundland-to-the-parallel-of-the-southern-boundary-of-virginia-and-from-the-atlantic-ocean-westward-to-the-102d-meridian-botany-botany-lemna-gibba-l-gibbous-duckweed-fig-1126-lemna-gibba-l-sp-pi-970-1753-thallus-slightly-unsymmetrical-obovate-or-short-obovate-14quot3quot-long-thickish-or-more-or-less-strongly-gibbous-be-neath-short-stalked-when-young-soon-separating-provided-with-stomata-which-are-sparse-beneath-obscurely-3-5-nerved-rootcap-mostly-short-pointed-rarely-l-RDJC3X.jpg ". An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Lemna gibba L. Gibbous Duckweed. Fig. 1126. Lemna gibba L. Sp. PI. 970. 1753. Thallus slightly unsymmetrical, obovate or short-obovate, 14"—3" long, thickish or more or less strongly gibbous be- neath, short-stalked when young, soon separating, provided with stomata which are sparse beneath, obscurely 3-5-nerved; rootcap mostly short-pointed, rarely l Stock Photo")
RMRDJC3X–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Lemna gibba L. Gibbous Duckweed. Fig. 1126. Lemna gibba L. Sp. PI. 970. 1753. Thallus slightly unsymmetrical, obovate or short-obovate, 14"—3" long, thickish or more or less strongly gibbous be- neath, short-stalked when young, soon separating, provided with stomata which are sparse beneath, obscurely 3-5-nerved; rootcap mostly short-pointed, rarely l
RMRE1KNE–. A manual of botany. Botany. Fiff. 974. A monoecious head of flowers of a species of Duckweed {Lemna mireor;, consisting of two male flowers, each of which is composed of a solitary stamen with a quadrilocular anther ; and one pistillate flower in the centre; the whole surrounded by a spathe. Fig. 975, Vertical section of the pistil of the same. temperate, and tropical regions. Illustrative Genera:—Lemna, Linn.; Pistia, Linn. There are above 20 species. Their pro- perties are imimportant. Series 6.—Apoearpce. Order 30. Tbiubidace^, the Triuris Order.—Diagnosis.— This is a small order of plant
RMRE2A34–. Botany all the year round; a practical text-book for schools. Botany. SUB-AiiRlAL ROOTS 129 rise to the various forms of sub-aerial roots, or those that grow above ground. 183. Water Roots. — Large numbers of plants are adapted to live in the water, either floating freely, as the duckweed {Lemna) and bladderwort {Utriciilaria), or an- chored to mud and sticks on the bottom. Water roots are generally white and threadlike and more tender and suc- culent than ordinary soil roots. Many land plants will develop water roots and thrive on that element if brought into contact with it. Place a cuttin
![. Practical physiology of plants. Plant physiology; 1894. 56 LEMNA. [CH. Ill (77) Experiments with Lemna. Though as above stated water-plants are not generally to be recommended, yet we have found Lemna "useful for purposes of demonstration. They grow rapidly and their increase being principally in one plane is easily noticed at a glance. Moreover a rough numerical estimate of the > t •. w Fig. 10. Exp. 77.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may no Stock Photo](https://c8.alamy.com/comp/RE0P08/practical-physiology-of-plants-plant-physiology-1894-56-lemna-ch-ill-77-experiments-with-lemna-though-as-above-stated-water-plants-are-not-generally-to-be-recommended-yet-we-have-found-lemna-quotuseful-for-purposes-of-demonstration-they-grow-rapidly-and-their-increase-being-principally-in-one-plane-is-easily-noticed-at-a-glance-moreover-a-rough-numerical-estimate-of-the-gt-t-w-fig-10-exp-77-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-no-RE0P08.jpg ". Practical physiology of plants. Plant physiology; 1894. 56 LEMNA. [CH. Ill (77) Experiments with Lemna. Though as above stated water-plants are not generally to be recommended, yet we have found Lemna "useful for purposes of demonstration. They grow rapidly and their increase being principally in one plane is easily noticed at a glance. Moreover a rough numerical estimate of the > t •. w Fig. 10. Exp. 77.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may no Stock Photo")
RMRE0P08–. Practical physiology of plants. Plant physiology; 1894. 56 LEMNA. [CH. Ill (77) Experiments with Lemna. Though as above stated water-plants are not generally to be recommended, yet we have found Lemna "useful for purposes of demonstration. They grow rapidly and their increase being principally in one plane is easily noticed at a glance. Moreover a rough numerical estimate of the > t •. w Fig. 10. Exp. 77.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may no
RMRDJC56–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus 2. DUCKWEED FAMILY. 447 2. LEMNA L. Sp. PI. 970. 1753. Thallus disc-shaped, usually provided with a central nerve and with or without two or four lateral nerves. Each thallus produces a single rootlet, which is devoid of vascular tis- sue and is commonly provided with a thin blunt or pointed rootcap. The ovary contains from one to six orthotropous, amphit
RMRE1N8M–. Elementary botany. Botany. CHAPTER XLVI. FURTHER STUDIES ON NUTRITION. 593. In our former studies on nutrition we found that such plants as the corn, pea, bean, etc., obtain their liquid food through the medium of root hairs. The liverworts and mosses oljtain theirs largely through similar outgrowths, the rhizoids, while a majority of the algse, being bathed on all sides by water, absorb liquid food through any part of the surface. We shall find it instructive to study some of the different ways in which diverse plants obtain their liquid food. 594. Nutrition in lemna.—A water plant is illus
RMRDCXNA–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. CHLOROCHYTRIUM. 549 Chlorochytrium lemnae Cohn.i The zygozoospores have four cilia and swarm for a short time in water. On plants of Lemna trimdca, the ciliated end becomes applied to the epidermis at the place where two cells are in contact, the zoospore becomes spherical, forms a membrane, and comes to rest (Fig. 324). It remains resting for a day or two, and assimilates so that a starch-grain is formed inside it.
RMRD9NYA–. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. THE BREEDING OF INSECTS. 331. Fig. 292.—Duckweed. Watercress, Nasturtium officinale. Stoneworts, Chara and Nitella (several species of each). Frog-spittle or water-silk, Spirogira. A small quantity of duckweed, Lemna (Fig. 292), placed on the surface of the water adds to the beauty of an aquarium. When it is necessary to add water to an aqua- rium on account of loss by evaporation, rain wa- ter should be used to prevent an undue ac- cumulation o
RMRD9NY7–. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. Fig. 292.—Duckweed. Watercress, Nasturtium officinale. Stoneworts, Chara and Nitella (several species of each). Frog-spittle or water-silk, Spirogira. A small quantity of duckweed, Lemna (Fig. 292), placed on the surface of the water adds to the beauty of an aquarium. When it is necessary to add water to an aqua- rium on account of loss by evaporation, rain wa- ter should be used to prevent an undue ac- cumulation of the mineral matter held in s
RMRDY740–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 946. Lemna polyrrhiza. 943. Lemna trisulca.. 944. Lemna minoi, 947. Lemna arrhiza.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
![. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. B Treiib18 for Listera ovata and Epipactis palustris, and by LeavittT3 for certain species of Goodyera and Spiranthes. It should be noted, however, that in Lemna (Caldwell"4), the reduced aquatic ally of the Araceae, a mul- ticellular suspensor is formed, the embryo resembling the Lili- um type described be- low. Among the Lilia- ceae a third type of e in b r y o - f o r m a t i o n seems to prevail. After the first segmentation of the fertilized egg, which is transverse, the subsequent div Stock Photo](https://c8.alamy.com/comp/RDYHR0/morphology-of-angiosperms-morphology-of-spermatophytes-part-ii-angiosperms-plant-morphology-b-treiib18-for-listera-ovata-and-epipactis-palustris-and-by-leavittt3-for-certain-species-of-goodyera-and-spiranthes-it-should-be-noted-however-that-in-lemna-caldwellquot4-the-reduced-aquatic-ally-of-the-araceae-a-mul-ticellular-suspensor-is-formed-the-embryo-resembling-the-lili-um-type-described-be-low-among-the-lilia-ceae-a-third-type-of-e-in-b-r-y-o-f-o-r-m-a-t-i-o-n-seems-to-prevail-after-the-first-segmentation-of-the-fertilized-egg-which-is-transverse-the-subsequent-div-RDYHR0.jpg ". Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. B Treiib18 for Listera ovata and Epipactis palustris, and by LeavittT3 for certain species of Goodyera and Spiranthes. It should be noted, however, that in Lemna (Caldwell"4), the reduced aquatic ally of the Araceae, a mul- ticellular suspensor is formed, the embryo resembling the Lili- um type described be- low. Among the Lilia- ceae a third type of e in b r y o - f o r m a t i o n seems to prevail. After the first segmentation of the fertilized egg, which is transverse, the subsequent div Stock Photo")
RMRDYHR0–. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. B Treiib18 for Listera ovata and Epipactis palustris, and by LeavittT3 for certain species of Goodyera and Spiranthes. It should be noted, however, that in Lemna (Caldwell"4), the reduced aquatic ally of the Araceae, a mul- ticellular suspensor is formed, the embryo resembling the Lili- um type described be- low. Among the Lilia- ceae a third type of e in b r y o - f o r m a t i o n seems to prevail. After the first segmentation of the fertilized egg, which is transverse, the subsequent div
![. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. B Treiib18 for Listera ovata and Epipactis palustris, and by LeavittT3 for certain species of Goodyera and Spiranthes. It should be noted, however, that in Lemna (Caldwell"4), the reduced aquatic ally of the Araceae, a mul- ticellular suspensor is formed, the embryo resembling the Lili- um type described be- low. Among the Lilia- ceae a third type of e in b r y o - f o r m a t i o n seems to prevail. After the first segmentation of the fertilized egg, which is transverse, the subsequent div Stock Photo](https://c8.alamy.com/comp/RDYHPP/morphology-of-angiosperms-morphology-of-spermatophytes-part-ii-angiosperms-plant-morphology-b-treiib18-for-listera-ovata-and-epipactis-palustris-and-by-leavittt3-for-certain-species-of-goodyera-and-spiranthes-it-should-be-noted-however-that-in-lemna-caldwellquot4-the-reduced-aquatic-ally-of-the-araceae-a-mul-ticellular-suspensor-is-formed-the-embryo-resembling-the-lili-um-type-described-be-low-among-the-lilia-ceae-a-third-type-of-e-in-b-r-y-o-f-o-r-m-a-t-i-o-n-seems-to-prevail-after-the-first-segmentation-of-the-fertilized-egg-which-is-transverse-the-subsequent-div-RDYHPP.jpg ". Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. B Treiib18 for Listera ovata and Epipactis palustris, and by LeavittT3 for certain species of Goodyera and Spiranthes. It should be noted, however, that in Lemna (Caldwell"4), the reduced aquatic ally of the Araceae, a mul- ticellular suspensor is formed, the embryo resembling the Lili- um type described be- low. Among the Lilia- ceae a third type of e in b r y o - f o r m a t i o n seems to prevail. After the first segmentation of the fertilized egg, which is transverse, the subsequent div Stock Photo")
RMRDYHPP–. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. B Treiib18 for Listera ovata and Epipactis palustris, and by LeavittT3 for certain species of Goodyera and Spiranthes. It should be noted, however, that in Lemna (Caldwell"4), the reduced aquatic ally of the Araceae, a mul- ticellular suspensor is formed, the embryo resembling the Lili- um type described be- low. Among the Lilia- ceae a third type of e in b r y o - f o r m a t i o n seems to prevail. After the first segmentation of the fertilized egg, which is transverse, the subsequent div
RMRE3EE9–. Practical text-book of plant physiology. Plant physiology. FlG. 72. Positions assumed by chloro- plast in Lemna trisulca ; A, in diffuse light, B, strong diffuse light and C, in direct sun- light. After Stahl. 215. Myctitropic Movements. lets of any of the leguminous species mentioned in the last ex- periment after 5 P. M. and early in the morning. The positions assumed are much more marked than those of the paraphoto- tropic reactions and may consist in moving the laminae down- ward or upward. The nyctitropic movements seem to be very clearly due to differences in illumination, although the
![. Elementary botany. Botany. Fig. 3 Fig. 37. Fronds of the duckweed (Lemna trisculca). of root hairs. Absorption of water therefore takes place through this rootlet and through the under side of the "frond." 62. Spirodela poly- rhiza.—This is a very curious plant, closely re- lated to the lemna and sometimes placed in the same genus. It occurs in similar situations, and is very readily grown in Spirudela pulyrhiza. aquaria. It reminds one of a little insect as seen in fig. 38. There are several rootlets on the under side of the frond. Absorption of water takes place here in the sam Stock Photo](https://c8.alamy.com/comp/RE3CG0/elementary-botany-botany-fig-3-fig-37-fronds-of-the-duckweed-lemna-trisculca-of-root-hairs-absorption-of-water-therefore-takes-place-through-this-rootlet-and-through-the-under-side-of-the-quotfrondquot-62-spirodela-poly-rhizathis-is-a-very-curious-plant-closely-re-lated-to-the-lemna-and-sometimes-placed-in-the-same-genus-it-occurs-in-similar-situations-and-is-very-readily-grown-in-spirudela-pulyrhiza-aquaria-it-reminds-one-of-a-little-insect-as-seen-in-fig-38-there-are-several-rootlets-on-the-under-side-of-the-frond-absorption-of-water-takes-place-here-in-the-sam-RE3CG0.jpg ". Elementary botany. Botany. Fig. 3 Fig. 37. Fronds of the duckweed (Lemna trisculca). of root hairs. Absorption of water therefore takes place through this rootlet and through the under side of the "frond." 62. Spirodela poly- rhiza.—This is a very curious plant, closely re- lated to the lemna and sometimes placed in the same genus. It occurs in similar situations, and is very readily grown in Spirudela pulyrhiza. aquaria. It reminds one of a little insect as seen in fig. 38. There are several rootlets on the under side of the frond. Absorption of water takes place here in the sam Stock Photo")
RMRE3CG0–. Elementary botany. Botany. Fig. 3 Fig. 37. Fronds of the duckweed (Lemna trisculca). of root hairs. Absorption of water therefore takes place through this rootlet and through the under side of the "frond." 62. Spirodela poly- rhiza.—This is a very curious plant, closely re- lated to the lemna and sometimes placed in the same genus. It occurs in similar situations, and is very readily grown in Spirudela pulyrhiza. aquaria. It reminds one of a little insect as seen in fig. 38. There are several rootlets on the under side of the frond. Absorption of water takes place here in the sam
![. Elementary botany. Botany. HOW PLANTS OBTAIN WATER. 27 'frond." A single rootlet grows out from the under side anrl is destitute. Fig. 3 Fig. 37. Fronds of the duckweed (Lemna trisculca). of root hairs. Absorption of water therefore takes place through this rootlet and through the under side of the "frond." 62. Spirodela poly- rhiza.—This is a very curious plant, closely re- lated to the lemna and sometimes placed in the same genus. It occurs in similar situations, and is very readily grown in Spirudela pulyrhiza. aquaria. It reminds one of a little insect as seen in fig. 38 Stock Photo](https://c8.alamy.com/comp/RE3CG5/elementary-botany-botany-how-plants-obtain-water-27-frondquot-a-single-rootlet-grows-out-from-the-under-side-anrl-is-destitute-fig-3-fig-37-fronds-of-the-duckweed-lemna-trisculca-of-root-hairs-absorption-of-water-therefore-takes-place-through-this-rootlet-and-through-the-under-side-of-the-quotfrondquot-62-spirodela-poly-rhizathis-is-a-very-curious-plant-closely-re-lated-to-the-lemna-and-sometimes-placed-in-the-same-genus-it-occurs-in-similar-situations-and-is-very-readily-grown-in-spirudela-pulyrhiza-aquaria-it-reminds-one-of-a-little-insect-as-seen-in-fig-38-RE3CG5.jpg ". Elementary botany. Botany. HOW PLANTS OBTAIN WATER. 27 'frond." A single rootlet grows out from the under side anrl is destitute. Fig. 3 Fig. 37. Fronds of the duckweed (Lemna trisculca). of root hairs. Absorption of water therefore takes place through this rootlet and through the under side of the "frond." 62. Spirodela poly- rhiza.—This is a very curious plant, closely re- lated to the lemna and sometimes placed in the same genus. It occurs in similar situations, and is very readily grown in Spirudela pulyrhiza. aquaria. It reminds one of a little insect as seen in fig. 38 Stock Photo")
RMRE3CG5–. Elementary botany. Botany. HOW PLANTS OBTAIN WATER. 27 'frond." A single rootlet grows out from the under side anrl is destitute. Fig. 3 Fig. 37. Fronds of the duckweed (Lemna trisculca). of root hairs. Absorption of water therefore takes place through this rootlet and through the under side of the "frond." 62. Spirodela poly- rhiza.—This is a very curious plant, closely re- lated to the lemna and sometimes placed in the same genus. It occurs in similar situations, and is very readily grown in Spirudela pulyrhiza. aquaria. It reminds one of a little insect as seen in fig. 38
![. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 44S . LEMNACEAE. Vol. I. 4. Lemna perpusilla Torr. Minute Duckweed. Fig. 1124. Lemna perpusilla Torr. Fl. N. Y. 2: 245. 1843. L. paucicostata Hegelm. in A. Gray, Man, Ed. 5, 681. 1868. L. perpusilla trinervis Austin, in A. Gray, Man. Ed. 5, 479. 1867. Thallus small, i"-ii" long, oblong to obovate, often purplish- tinged beneath, unsymmetrical and abru Stock Photo](https://c8.alamy.com/comp/RDJC4D/an-illustrated-flora-of-the-northern-united-states-canada-and-the-british-possessions-from-newfoundland-to-the-parallel-of-the-southern-boundary-of-virginia-and-from-the-atlantic-ocean-westward-to-the-102d-meridian-botany-botany-44s-lemnaceae-vol-i-4-lemna-perpusilla-torr-minute-duckweed-fig-1124-lemna-perpusilla-torr-fl-n-y-2-245-1843-l-paucicostata-hegelm-in-a-gray-man-ed-5-681-1868-l-perpusilla-trinervis-austin-in-a-gray-man-ed-5-479-1867-thallus-small-iquot-iiquot-long-oblong-to-obovate-often-purplish-tinged-beneath-unsymmetrical-and-abru-RDJC4D.jpg ". An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 44S . LEMNACEAE. Vol. I. 4. Lemna perpusilla Torr. Minute Duckweed. Fig. 1124. Lemna perpusilla Torr. Fl. N. Y. 2: 245. 1843. L. paucicostata Hegelm. in A. Gray, Man, Ed. 5, 681. 1868. L. perpusilla trinervis Austin, in A. Gray, Man. Ed. 5, 479. 1867. Thallus small, i"-ii" long, oblong to obovate, often purplish- tinged beneath, unsymmetrical and abru Stock Photo")
RMRDJC4D–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 44S . LEMNACEAE. Vol. I. 4. Lemna perpusilla Torr. Minute Duckweed. Fig. 1124. Lemna perpusilla Torr. Fl. N. Y. 2: 245. 1843. L. paucicostata Hegelm. in A. Gray, Man, Ed. 5, 681. 1868. L. perpusilla trinervis Austin, in A. Gray, Man. Ed. 5, 479. 1867. Thallus small, i"-ii" long, oblong to obovate, often purplish- tinged beneath, unsymmetrical and abru
![. Practical physiology of plants. Plant physiology; 1894. CH. Ill] LEMNA. 57 amount of increase in a given time can be made by counting the fronds; thus in fig. 10 the culture 8 which has about 21 fronds consisted originally of six separate fronds, as shown in culture W. We grow the Lemna in narrow cylinders containing 300 c.c. of fluid; if the cylinders are darkened by black card- board covei-s the cultures keep reasonably free from algse. Fig. 10 gives the result of an experiment carried on in a greenhouse in the winter. Three jars 8, K, W, were prepared, in each of which six fronds were pla Stock Photo](https://c8.alamy.com/comp/RE0P06/practical-physiology-of-plants-plant-physiology-1894-ch-ill-lemna-57-amount-of-increase-in-a-given-time-can-be-made-by-counting-the-fronds-thus-in-fig-10-the-culture-8-which-has-about-21-fronds-consisted-originally-of-six-separate-fronds-as-shown-in-culture-w-we-grow-the-lemna-in-narrow-cylinders-containing-300-cc-of-fluid-if-the-cylinders-are-darkened-by-black-card-board-covei-s-the-cultures-keep-reasonably-free-from-algse-fig-10-gives-the-result-of-an-experiment-carried-on-in-a-greenhouse-in-the-winter-three-jars-8-k-w-were-prepared-in-each-of-which-six-fronds-were-pla-RE0P06.jpg ". Practical physiology of plants. Plant physiology; 1894. CH. Ill] LEMNA. 57 amount of increase in a given time can be made by counting the fronds; thus in fig. 10 the culture 8 which has about 21 fronds consisted originally of six separate fronds, as shown in culture W. We grow the Lemna in narrow cylinders containing 300 c.c. of fluid; if the cylinders are darkened by black card- board covei-s the cultures keep reasonably free from algse. Fig. 10 gives the result of an experiment carried on in a greenhouse in the winter. Three jars 8, K, W, were prepared, in each of which six fronds were pla Stock Photo")
RMRE0P06–. Practical physiology of plants. Plant physiology; 1894. CH. Ill] LEMNA. 57 amount of increase in a given time can be made by counting the fronds; thus in fig. 10 the culture 8 which has about 21 fronds consisted originally of six separate fronds, as shown in culture W. We grow the Lemna in narrow cylinders containing 300 c.c. of fluid; if the cylinders are darkened by black card- board covei-s the cultures keep reasonably free from algse. Fig. 10 gives the result of an experiment carried on in a greenhouse in the winter. Three jars 8, K, W, were prepared, in each of which six fronds were pla
![. Heredity and evolution in plants. Heredity; Plants. EVOLUTION of Woljfia possess still simpler bodies, somewhat globose, with neither roots, veins, nor other organs, except flowers; even flowers are unknown in some species {e.g., Wolffia populifera, Fig. 44). Wolffia punctata measures only 0.5-0.8 mm. long. The plants are fittingly described in the manuals as "minute, alga-like grains," floating on or ecr^. Fig. 44.—Lemnaceae. e, /, Wolffia papuUfera. modified.) a, b, c, Lemna Irisiilca; d, Wolffia punctata; (Redrawn from Britton and Brown, slightly just beneath the surface of stil Stock Photo](https://c8.alamy.com/comp/RDG1F1/heredity-and-evolution-in-plants-heredity-plants-evolution-of-woljfia-possess-still-simpler-bodies-somewhat-globose-with-neither-roots-veins-nor-other-organs-except-flowers-even-flowers-are-unknown-in-some-species-eg-wolffia-populifera-fig-44-wolffia-punctata-measures-only-05-08-mm-long-the-plants-are-fittingly-described-in-the-manuals-as-quotminute-alga-like-grainsquot-floating-on-or-ecr-fig-44lemnaceae-e-wolffia-papuufera-modified-a-b-c-lemna-irisiilca-d-wolffia-punctata-redrawn-from-britton-and-brown-slightly-just-beneath-the-surface-of-stil-RDG1F1.jpg ". Heredity and evolution in plants. Heredity; Plants. EVOLUTION of Woljfia possess still simpler bodies, somewhat globose, with neither roots, veins, nor other organs, except flowers; even flowers are unknown in some species {e.g., Wolffia populifera, Fig. 44). Wolffia punctata measures only 0.5-0.8 mm. long. The plants are fittingly described in the manuals as "minute, alga-like grains," floating on or ecr^. Fig. 44.—Lemnaceae. e, /, Wolffia papuUfera. modified.) a, b, c, Lemna Irisiilca; d, Wolffia punctata; (Redrawn from Britton and Brown, slightly just beneath the surface of stil Stock Photo")
RMRDG1F1–. Heredity and evolution in plants. Heredity; Plants. EVOLUTION of Woljfia possess still simpler bodies, somewhat globose, with neither roots, veins, nor other organs, except flowers; even flowers are unknown in some species {e.g., Wolffia populifera, Fig. 44). Wolffia punctata measures only 0.5-0.8 mm. long. The plants are fittingly described in the manuals as "minute, alga-like grains," floating on or ecr^. Fig. 44.—Lemnaceae. e, /, Wolffia papuUfera. modified.) a, b, c, Lemna Irisiilca; d, Wolffia punctata; (Redrawn from Britton and Brown, slightly just beneath the surface of stil
RMRDY749–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 945. Lemna gibba.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
![. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 11. Monocotyledons-] LXXVII. LEMNACE^E,. 946. Lemna trisulca, L. Ivy-leaved Duckiveed. 237. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve Stock Photo](https://c8.alamy.com/comp/RDWM5D/illustrations-of-the-british-flora-a-series-of-wood-engravings-with-dissections-of-british-plants-botany-botany-11-monocotyledons-lxxvii-lemnacee-946-lemna-trisulca-l-ivy-leaved-duckiveed-237-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-fitch-w-h-walter-hood-1817-1892-smith-george-worthington-1835-1917-bentham-george-1800-1884-handbook-of-the-british-flora-london-l-reeve-RDWM5D.jpg ". Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 11. Monocotyledons-] LXXVII. LEMNACE^E,. 946. Lemna trisulca, L. Ivy-leaved Duckiveed. 237. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve Stock Photo")
RMRDWM5D–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 11. Monocotyledons-] LXXVII. LEMNACE^E,. 946. Lemna trisulca, L. Ivy-leaved Duckiveed. 237. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve
RMRDWM4K–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. Lemna gibba, L. Gibbous Duckweed.. 949. Lemna polyrrhiza, L. Greater Duckiveed. '-c^-oo 3:;ca 950. Lemna arrhiza, L. Wolffiaar., Wim., Michelii, Schl. Rootless Ducliweed. LXXVIIL NAIADE/E.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 183
RMRDWM4E–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 949. Lemna polyrrhiza, L. Greater Duckiveed. '-c^-oo 3:;ca 950. Lemna arrhiza, L. Wolffiaar., Wim., Michelii, Schl. Rootless Ducliweed. LXXVIIL NAIADE/E.. 95 r. Zostera marina, L.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; B
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