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Pilularia Stock Photos and Images
RM2A2RRMY–Four-leafed clover and common pills, A: Marsilea quadrifolia L. - Four-leafed Kleefarn, B: Pilularia globulifera L. - Spherical Pill herb or common Pillenfarn, Family: 5. Marsiliaceae - Schleimfarngewächse, plate 16, after p. 44 (Bd., 1), 1886, Otto Wilhelm Thomé: Prof. Dr. Thomé's Flora von Deutschland, Österreich und der Schweiz in Wort und Bild. Gera-Untermhaus: Verlag von Fr. Eugen Köhler, [1886
RM2H459T6–A spreading pillwort plant (Pilularia species) with details of its sporocarp. Coloured engraving by J. Pass, c. 1825.
RFH1NBA4–pillwort, Pilularia globulifera (top left), Marsilea quadrifolia (top right), hart's-tongue, Asplenium scolopendrium L. und scolopendrium vulgare (bottem left), floating fern, Salvinia natans (bottem center), adder's-tongue, Ophioglossum vulgatum (bottem right)
RM2AWTN34–Text-book of botany, morphological and physiological . capsule increases, thecentral cell first divides into two, and then, by successive bipartitions, into eightspore-mother-cells, which become isolated in the cavity of the sporangium which isfilled with granular fluid, and assume a round form. The inner parietal layerremains in the condition of a delicate epithelium till the time of the formation ofthe spores, but disappears when they are ripe; so that here also the wall of thesporangium finally consists of only one layer. In Marsilea and Pilularia, where theenvelope of the sporocarp is very
RFH17MYH–Gewoehnlicher Pillenfarn, Kugel-Pillenfarn, Pilularia globulifera (oben links), Kleefarn auch Vierblättriger Kleefarn, Marsilea quadrifolia (oben rechts), Hirschzungenfarn auch Hirschzunge, Asplenium scolopendrium L. und scolopendrium vulgare (unten links), Gemeine Schwimmfarn auch Gewoehnlicher Schwimmfarn, Salvinia natans (unten mitte), Gewoehnliche Natternzunge, Ophioglossum vulgatum (unten rechts)
RM2AWR9PT–The structure & development of the mosses and ferns (Archegoniatae) . genera Pilularia is evidently the nearer tothe latter. The development of both gametophyte and sporo-phyte in the two corresponds very closely. The sporangia are borne in sporocarps, which are morpho-logically very different from those of the Salviniaceae, beingmetamorphosed leaf segments enclosing several sori, and notsingle sori enclosed simply in an indusium. The sporesgerminate with extraordinary rapidity, especially in Marsilia, XII LEPTOSPORANGIA T.E HETEROSPORErE 399 and in M. JEgyptiaca the writer has found a two-cel
RM2AWTHX0–Text-book of botany, morphological and physiological . complicated differences indensity. The microspores so far resemblethe macrospores that their exospore has alsoa firm inner layer which is cuticularised andshows an internal structure depending on dif-ference of density. This layer is surroundedin Marsilea by a thick, in Pilularia by athin hyaline envelope capable of swellmg inwater. The Class Rhizocarpeae contains, besidesthe genera that have already been mentioned,only one other, Azolla, which, although notyet accurately known is nearly allied to Sal-vinia. The four genera form, therefo
RM2AWR4WD–The structure & development of the mosses and ferns (Archegoniatae) . Fig. 211.—Pilularia glolmlifcra (L.). A, B,Young female prothallia, longitudinal sec-tions, X 300 ; c, neck canal cell; C, sectionof a recently fertilised archegonium, X 300 ;sp, spermatozoid within the egg. large, but in Marsilia it is thelarger. In both, the receptivespot is evident. The nucleusis unusually small in Marsilia,which otherwise resemblesPilularia. The phenomena of fecunda-tion are very striking in theMarsiliacese. The mucilagin-ous layer about the macrospore attracts and retains thespermatozoids, which collect
RM2AWTMM7–Text-book of botany, morphological and physiological . he three sister-cells. The remainderof these abortive sister-cells usually remainfor some considerable time shrivelled upand hanging to the apex of the ma-crospore, and may even sometimes befound on it when ripe. The macrosporeof Pilularia is at first entirely clothedwith one coat, but after it has attainedabout one-third of its ultimate length,it has two, an inner compact brown andan outer hyaline one. While the sporeis growing, this hyaline coat forms adome-shaped projection at the apex ofthe spore (Fig. 298 d) and at the sametime a thir
RMPFN6D9–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Section of macrospore of Pilularia some time after germination, 50 diam. a, two layers of the exospore, the outer, vertically striated, the inner, homogeneous; b, cavity of endospore bounded superiorly by the prothallium, the papilkcform summit of which projects through the canal of the exospore. which is surrounded by a white coriaceous exospore. This last exhibits two distinct layers, of which the internal is colourless and vitreous, without trace of structure ; while the external appears to be formed of prismatic colu
RM2AWR5PH–The structure & development of the mosses and ferns (Archegoniatae) . nucleus, which occupies the apicalpapilla. This is filled with fine granules, but is entirely freefrom the very large starch grains of the large basal part of thespore. The nucleus is somewhat flattened. A similar arrange-ment of the spore contents is found in Pihilaria, but the apexof the spore does not form a distinct papilla. The epispore isof nearly equal thickness, except at the extreme apex, in ^ Strasburger (11), vol. iv. p. 122. 404 MOSSES AND FERNS CHAP. Marsilia, but in Pilularia, especially in P. globulifera, thee
RMPG0550–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. LEPTOSPORANGIATM HETEROSPORE^ 423 developed. A noticeable difference is the segregation of the protoplasm containing the nucleus, which occupies the apical papilla. This is filled with fine granules, but is entirely free from the very large starch grains of the large basal part of the spore. The nucleus is somewhat flattened. A similar arrange- ment of the spore contents is found in Pilularia, but the apex of the spore does not form a distinct papilla. The epispore is of nearly equal thickness
RMMWNBKK–. Français : Dessin de Pilularia minuta . 9 March 2014, 13:25:59. Durieu de Maisonneuve 485 Pilularia minuta
RMW27WNR–Archive image from page 320 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana05todd Year: 1859 Section of macrospore of Pilularia some time after germination, 50 diam. a, two layers of the exospore, the outer, vertically striated, the inner, homogeneous; b, cavity of endospore bounded superiorly by the prothallium, the papilkcform summit of which projects through the canal of the exospore. which is surrounded by a white coriaceous exospore. This last exhibits two distinct layers, of which the internal is colourless and vitreous, without trace of struct
RM2AWR0B5–The structure & development of the mosses and ferns (Archegoniatae) . Fig. 214.—Part of a fruiting plant oiPiiuiaria Americana (A. Br.), X4 ; sp, sporocarps. 412 MOSSRS AND FERNS CHAP. Pilularia retain the same structure as the cotyledon. InMarsilia they are ahvays four-lobed. The spor^carps aremodified outgrowths of the petiole, which are often formed sonear the base as to appear to grow directly from the stem.They often are borne singly, but may occur in considerablenumbers—twenty or more in M. polycarpa—and are globularin Pilularia, bean-shaped in Marsilia. The growth of the.
RMPG055B–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. XI LEPTOSPORANGIAT^ HETEROSPOREM 421 four hours for its completion. Pilularia approaches much nearer to the Polypodiaceas in the structure of the antheridium (Fig. 246). The first funnel-shaped wall is much more frequently extended to the basal wall, and the two groups of sperm cells are much less distinct than in Marsilia. The spermatqzoids of Marsilia are at once distinguished by a great number of coils, sometimes thirteen or fourteen in M. vestita. The cilia are very numerous, but are attac
RMMW0E3E–. Français : Dessin de Pilularia minuta . 9 March 2014, 13:25:59. Durieu de Maisonneuve 484 Pilularia minuta
RM2AWPY2C–The structure & development of the mosses and ferns (Archegoniatae) . Fig. 216.—Pilularia Americana (A. Br.). Development of the sporocarp. A, Very youngsporophyll with sporocarp rudiment {sf), showing a distinct apical cell ; B-D, longitudinalsections of young stages, showing the formation of the sorus canals {sc), X130; i, theoriginal apex of the young sporocarp ; L, secondary lobes or leaflets; E, longitudinal section ofan older stage, X about 130; i-, s, young sori; F, transverse section of an older sorus, XiSo. lateral ones are formed. As in the sterile joart of the leaf growthis stronger
RMPG14PW–. Fossil plants : for students of botany and geology . Paleobotany. 58 PTEBIDOSPERMEAE [CH. portion of which is characterised by regular longitudinal rows of palisade-like cells comparable with the broad palisade-layer in the sporocarp of Pilularia. On the exposed surface of this paKsade-tissue are small dark structureless pegs^, possibly the remains of a mucilaginous layer such as occurs on the seed-coats of some recent Flowering plants. At the base of the nucellus the chalazal region, fig. 408, C, ch, is provided with sclerous elements and forms a hard investment to the axial vascular strand
RMMYP93C–. Français : Dessin de Pilularia minuta . 9 March 2014, 13:25:59. Durieu de Maisonneuve 423 Pilularia minuta
![Text-book of botany, morphological and physiological . urg 1869).-A. Braun, Ueber Marsilia u. Pilularia (Monatsber. der konigl. Akad. der Wissensch^ Berlin, Aug.i87o).-E. Russow, Histologic u. Entwickelung der Sporenfrucht von Marsilia (Dorpat 1871).[Strasburger, Ueber Azolla, mit 7 Tafeln. Jena 1873.] 3«4 VASCULAR CRYPTOGAMS. The development of the Antherozoids is preceded, in the genus Salvinia, by theformation of a very rudimentary male prothallium. The microspores lie imbeddedin a mass of granular hardened mucilage, which fills up the whole of the microspo-rangium; they do not escape, but Stock Photo](https://c8.alamy.com/comp/2AWTYB4/text-book-of-botany-morphological-and-physiological-urg-1869-a-braun-ueber-marsilia-u-pilularia-monatsber-der-konigl-akad-der-wissensch-berlin-augi87o-e-russow-histologic-u-entwickelung-der-sporenfrucht-von-marsilia-dorpat-1871-strasburger-ueber-azolla-mit-7-tafeln-jena-1873-34-vascular-cryptogams-the-development-of-the-antherozoids-is-preceded-in-the-genus-salvinia-by-theformation-of-a-very-rudimentary-male-prothallium-the-microspores-lie-imbeddedin-a-mass-of-granular-hardened-mucilage-which-fills-up-the-whole-of-the-microspo-rangium-they-do-not-escape-but-2AWTYB4.jpg "Text-book of botany, morphological and physiological . urg 1869).-A. Braun, Ueber Marsilia u. Pilularia (Monatsber. der konigl. Akad. der Wissensch^ Berlin, Aug.i87o).-E. Russow, Histologic u. Entwickelung der Sporenfrucht von Marsilia (Dorpat 1871).[Strasburger, Ueber Azolla, mit 7 Tafeln. Jena 1873.] 3«4 VASCULAR CRYPTOGAMS. The development of the Antherozoids is preceded, in the genus Salvinia, by theformation of a very rudimentary male prothallium. The microspores lie imbeddedin a mass of granular hardened mucilage, which fills up the whole of the microspo-rangium; they do not escape, but Stock Photo")
RM2AWTYB4–Text-book of botany, morphological and physiological . urg 1869).-A. Braun, Ueber Marsilia u. Pilularia (Monatsber. der konigl. Akad. der Wissensch^ Berlin, Aug.i87o).-E. Russow, Histologic u. Entwickelung der Sporenfrucht von Marsilia (Dorpat 1871).[Strasburger, Ueber Azolla, mit 7 Tafeln. Jena 1873.] 3«4 VASCULAR CRYPTOGAMS. The development of the Antherozoids is preceded, in the genus Salvinia, by theformation of a very rudimentary male prothallium. The microspores lie imbeddedin a mass of granular hardened mucilage, which fills up the whole of the microspo-rangium; they do not escape, but
RMPG0541–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. x: LEPTOSPORANGIATM HETEROSPOREM 427 usually continue long, and the subsequent growth is purely basal. The cotyledon is alike in both genera, and is a slender cylindrical leaf tapering to a fine point, where the cells are much elongated and almost colourless. Its growth is at first slow, but at a later period (in Pilularia glohulifera about the eighth day) it begins to grow with great rapidity and soon reaches its full size. This is largely due to a simple elongation and ex- pansion of the cel
RMMYP938–. Français : Dessins de deux plantes : Pilularia minuta et Marsilea pubescens English: Drawings of two plants : Pilularia minuta and Marsilea pubescens . 9 March 2014, 13:09:03. Durieu de Maisonneuve 423 Pilularia minuta, Marsilea pubescens
RMRHRCF3–. Billeder af nordens flora. Plants; Plants; Plants. PILLEDRAGER, pilularia globulifera. 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.. Mentz, August, 1867-1944; Ostenfeld, C. H. (Carl Hansen), 1873-1931. København, G. E. C. Gad's forlag
RMPG052Y–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 434 MOSSES AND FERNS CHAP. the cortical tissue strongly developed and full of starch. These are supposed to survive long periods of drought, and to germi- nate under favourable conditions. A condition somewhat analogous to this appears in M. vestita (Fig. 243, A), but whether these short lateral branches are of this nature was not investigated. The Sporocarp (Sachs (i); Goehel (6); Meunier (i); {Johnson {i, 2)) The development of the sporocarp is much the same in the. Fig. 254.—Pilularia Ameri
RMMWNBKR–. Français : Dessins de deux plantes : Pilularia minuta et Marsilea pubescens English: Drawings of two plants : Pilularia minuta and Marsilea pubescens . 9 March 2014, 13:09:03. Durieu de Maisonneuve 485 Pilularia minuta, Marsilea pubescens
RMRDF29P–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. LEPTOSPORANGIATM HETEROSPORE^ 423 developed. A noticeable difference is the segregation of the protoplasm containing the nucleus, which occupies the apical papilla. This is filled with fine granules, but is entirely free from the very large starch grains of the large basal part of the spore. The nucleus is somewhat flattened. A similar arrange- ment of the spore contents is found in Pilularia, but the apex of the spore does not form a distinct papilla. The epispore is of nearly equal thickness
RMPG054N–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 424 MOSSES AND FERNS off first from the papilla. In Pilularia the next wall is parallel to this transverse primary wall, and this may also occur in Marsilia, but in the latter more commonly the first lateral cell is first cut off by a vertical wall, and this is followed by two others, which intersect it and include a large central cell (Fig. 248, E), from which a basal cell is subsequently separated. In Pilularia, besides the formation of the basal cell by the second wall, the central cell is,
RMMW0E39–. Français : Dessins de deux plantes : Pilularia minuta et Marsilea pubescens English: Drawings of two plants : Pilularia minuta and Marsilea pubescens . 9 March 2014, 13:09:03. Durieu de Maisonneuve 484 Pilularia minuta, Marsilea pubescens
RMRDF2AC–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. XI LEPTOSPORANGIAT^ HETEROSPOREM 421 four hours for its completion. Pilularia approaches much nearer to the Polypodiaceas in the structure of the antheridium (Fig. 246). The first funnel-shaped wall is much more frequently extended to the basal wall, and the two groups of sperm cells are much less distinct than in Marsilia. The spermatqzoids of Marsilia are at once distinguished by a great number of coils, sometimes thirteen or fourteen in M. vestita. The cilia are very numerous, but are attac
RMPG055D–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 420 MOSSES AND FERNS CHAP. than in Pilularia (Fig. 245, A, y). The next division is not always the same, but is usually effected by a wall nearly parallel to the first one, but more or less concave (Fig. 244, D). Some- times the antheridial cell divides at once by an oblique wall into two nearly equal cells, from each of which a group of sperm cells is later cut off. In no case was the central cell cut off by a dome-shaped wall, such as is common in the homosporous Ferns, and also in Pilularia
RMMAAHND–. Dr. L. Rabenhorst's Kryptogamen-Flora von Deutschland, Oesterreich und der Schweiz . Pilularia giobulifera L. Macro- spore im Längsschnitte: a Sporenhaut: b, c und d die drei Schichten des Epi- sporiums, worüber der Text S. GIO zu vergleichen ist. Vergr. 80 fach.
RMRD64R0–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Section of macrospore of Pilularia some time after germination, 50 diam. a, two layers of the exospore, the outer, vertically striated, the inner, homogeneous; b, cavity of endospore bounded superiorly by the prothallium, the papilkcform summit of which projects through the canal of the exospore. which is surrounded by a white coriaceous exospore. This last exhibits two distinct layers, of which the internal is colourless and vitreous, without trace of structure ; while the external appears to be formed of prismatic colu
RMPG16T4–. Fossil plants : for students of botany and geology . Paleobotany. 64 CZEKANOWSKIA [CH. Jurassic floras and a few examples are recorded from Cretaceous strata. CzekanowsJcia Murrayana (Lindley and Hutton). On the specimen shown in fig. 660, A Lindley and Hutton^ founded the species Solenites Murrayana which they compared. A B Fig. 660. A, B, Czekanowshia Murrayana. A, The type-specimen of Solenites Murrayana, Lind. and Hutt., from the Middle Jurassic plant-beds of York- shire. (British Museum, no. 3685, no. V. 368-1.) with Isoetes and Pilularia. The type-specimen is from the Middle Jurassic p
RMMCRA22–. Primordiale Landpflanzen, von Lesquereux im Obersilur Amerikas beobachtet. 1. Psilophyton cornutum, Lqx. — 2. bis 4. Sphenopliyllum primaevum, Lqx. — 5. An- nularia Romingeri, Lqx. — 6. I'rotostigma sigillaroides, Lqx. unbestimmte Charaktere zu besitzen und sich durch die Hymeno- phylleen den Farnen, durch Psilotum den Bärlappen und durch Pilularia den Rhizocarpeen zu nähern. Die beinahe nackten und durch successive Gabeltheilung verästelten Stämme von Psilo- phyton, die bei ihrer Entwicklung wie ein Bischofstab eingerollt waren, Hessen dünne, mit kleinen einfachen, mehr oder minder lederart
Search Results for Pilularia Stock Photos and Images (137)
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