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Salviniaceae Stock Photos and Images
RMCRER19–Water spangles, Floating Moss, Floating Fern, water fern (Salvinia minima), floating individuals
RMHMKYJC–Floating Fern, Floating Watermoss, Floating Moss or Water Butterfly Wings (Salvinia natans), Salviniaceae.
RF2K4T2HG–The floating fern (latin name: Salvinia natans) in the pond in Special Nature reserve Gornje podunavlje in Serbia
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
RMW1B6WK–Archive image from page 329 of Deutsche Flora Pharmaceutisch-medicinische Botanik Ein. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker . deutscheflorapha00kars Year: 1880-83. 286 RHzocarpeae. Salviniaceae. bei der Keimung 4klappig sich öffnenden, kugeligen, korkigen Sporangien- behälter stehen auf sehr kurzen Stielen neben den Blättern; zuweilen auf diesen. Sie enthalten innerhalb geschlossener Hüllen sitzende Gruppen von Sporangien, auf kissenf. Fruchtboden, die den Mittellinien der künf
RMPF9FF1–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. 286 RHzocarpeae. Salviniaceae. bei der Keimung 4klappig sich öffnenden, kugeligen, korkigen Sporangien- behälter stehen auf sehr kurzen Stielen neben den Blättern; zuweilen auf diesen. Sie enthalten innerhalb geschlossener Hüllen sitzende Gruppen von Sporangien, auf kissenf. Fruchtboden, die den Mittellinien der künfti- gen Klappen entsprechen, wodurch sie 4fäche- rig erscheinen. Jeder Sporangienhaufen be- steht,
RF2K4T2H9–The floating fern (latin name: Salvinia natans) in the pond in Special Nature reserve Gornje podunavlje in Serbia
RMRPXJK0–. Text-book of botany, morphological and physiological. Botany. FILICINEM. 453 latter is cup-shaped and therefore open at the apex, whereas the wall of the former completely encloses the sorus, as does the indusium of Cyathea, The sporocarp of the Salviniaceae is then a sorus, the term being used in the sense in which it is applied to the fructification of Ferns, but here the indusium is much more fully developed, consisting of two layers of cells, the walls of which, toward the upper part of the capsule, become lignified in Azolla. Each sporocarp contains either microsporangia or macrosporang
RMT3WMPN–Archive image from page 92 of Die Pflanzenwelt Afrikas, insbesondere seiner. Die Pflanzenwelt Afrikas, insbesondere seiner tropischen Gebiete : Grundzge der Pflanzenverbreitung im Afrika und die Charakterpflanzen Afrikas diepflanzenwelta02engluoft Year: 1910 Filicales. — Salviniaceae. 67 gambien. Einige andere Arten besitzen keinen Zahn am Sporocarp, nämlich die in Senegambien vorkommende JI. pygmaca A. Brongn. (= M. gyDinocarpa Lepr.) sowie J/. nnbica A. Br. in Kordofan, alles kleine, an ausgetrockneten Tümpeln wachsende Arten. Farn. Salviniaceae. Von dieser Familie der Unterreihe Hydropte
RMPFNXCG–. De flora van Nederland. Plants. FAMILIE 8. â SALVINIACEAE. â 237 Voorkomen in Europa en in Nederland. De plant komt in Midden- en Zuid-Europa voor in stilstaande en langzaam stroomende wateren, vooral gaarne op houtvlotten. Zij is bij ons bij Zwolle en Leerdam gevonden. 2. Az()lla ) Lmk Azolla. Sporekapsels vliezig, eenhokkii.,^ meest niet openspringend. Zij bevatten 1-2 niacrosporangiën, deze zijn spits, eirond, bijna zittend , andere bevatten talrijke, bolronde, gesteelde microsporangiën. De sporekapsels zitten aan het ondergedoken bladdeel van het onderste blad van een tak en staan 2-4
RMRPXJHM–. Text-book of botany, morphological and physiological. Botany. 456 VASCULAR CRYPTOGAMS, The development of the sporangium begins with the outgrowth of one of the superficial cells of the placenta which bears the sorus. The subsequent divisions are the same as those above described with reference to Salvinia, so that here also the sporangium is soon elevated on a stalk and consists of a wall of a single layer of cells and of a tetrahedral central cell or archesporium (Fig. 322, I-IIT). From this a tapetum is cut off by four septa parallel to its sides, which, as in the Salviniaceae and in the
RMPFNXCM–. De flora van Nederland. Plants. 236 — SALVINIACEAE. — FAMILIE 8. Voorkomen in Europa en in Nederland. De plant komt in West-, Midden- en Zuid-Europa in moerassen en vijvers voor, ook wel aan droog geworden oevers van kleine meertjes en in uitgedroogde slooten. Zij is bij ons in vele streken vrij algemeen. Familie 8. Salviniaceae D. C Watervaren s. Sporenomhulsels eenhokkig, eenslachtig, de eene een uit vele micro- sporangiën bestaanden sorus bevattend, de andere met een sorus, die uit een veel geringer aantal macrosporangiën bestaat (soms slechts uit 1). De microsporen liggen in schuimachtig
RMRDYF6P–. A textbook of botany for colleges and universities ... Botany. Figs. 412—414. — Male gametoph3^e of Marsilea: 412, first division of the microspore into vegetative cell (the smaller) and antheridium initial; 413, first division of an- theridium initial; 414, antheridium with wall of sterile cells investing spermatogenous cells (shaded). — After Campbell. the sporocarp is an indusium investing a sorus, while in Marsileaceae it is a leaf blade inclosing a group of sori with their indusia. Gametophytes. —The male gametophyte does not emerge from the microspore, as it does in Salviniaceae, remai
RMRDYF6W–. A textbook of botany for colleges and universities ... Botany. Figs. 412—414. — Male gametoph3^e of Marsilea: 412, first division of the microspore into vegetative cell (the smaller) and antheridium initial; 413, first division of an- theridium initial; 414, antheridium with wall of sterile cells investing spermatogenous cells (shaded). — After Campbell. the sporocarp is an indusium investing a sorus, while in Marsileaceae it is a leaf blade inclosing a group of sori with their indusia. Gametophytes. —The male gametophyte does not emerge from the microspore, as it does in Salviniaceae, remai
RMRDYF72–. A textbook of botany for colleges and universities ... Botany. 178 MORPHOLOGY rangia below. There is also a swelling tissue which in this case bursts out at the top of the sporocarp. The remarkable longevity and resisting power of the sporocarps of Marsilea deserve mention. Sporo- carps preserved on herbarium sheets for fifty years and others kept in 95 per cent alcohol have resumed activity when placed in water. In contrasting the structures called sporocarps in Salviniaceae and Marsileaceae, it is evident that they are very different. In Salviniaceae. Please note that these images are extr
RMANWNJJ–Water spangles, Floating Moss, Floating Fern, water fern (Salvinia minima), floating leaves
RMRDYF6K–. A textbook of botany for colleges and universities ... Botany. PTERIDOPHYTES 179 ferns, and that Salviniaceae have the transverse wall of the older eusporangiate Marattiaceae. Conclusions. — It is evident that the water ferns are a very specialized aquatic group, probably derived from the leptosporangiate ferns. More- over, the features of the sporangium, in development and output, in- dicate an origin from one of the higher leptosporangiate families. The. Figs. 416, 417. — Female gametophyte of Marsilea: 416, the tissue protruding from the heavy megaspore wall developing a single large arch
RMANWNKK–Floating Moss, Floating Fern, water fern (Salvinia auriculata, Salvinia rotundifolia), detail of the floating leaves
RMRDYF8D–. A textbook of botany for colleges and universities ... Botany. PTERIDOPIIYTES 171 Salviniaceae These are the floating ferns, comprising two genera, Salvinia and Azolla, with few species, but some of them are widely distributed. Sporophyte. — The sporophyte body is a floating, dorsiventral stem, that develops by an apical cell with two cutting faces, instead of the apical cell with three cutting faces usual among ferns. The segments are cut off right and left, and subsequent divisions result in eight rows of cells, four ventral and four dorsal. In Salvinia (fig. 396) the dorsal rows of cells
RMANWNKJ–Floating Moss, Floating Fern, water fern (Salvinia auriculata, Salvinia rotundifolia), detail of the floating leaves
RMRDYF7Y–. A textbook of botany for colleges and universities ... Botany. 176 MORPHOLOGY. Fig. 407. — MarsUea: showingdorsiventral stem giving rise to roots below and leaves above, circinate vernation of developing leaves, and adaxially borne sporocarps. Marsileaceae This family comprises the genera MarsUea and Pilularia, whose species root in the mud, under water or in muddy flats. Sporophyte. —The stem is dorsiventral, as in the Salviniaceae, but it develops from an apical cell with three cutting faces, thus form- ing three longitudinal rows of segments. The leaves alternate from the dorsal segments,
RMANWNJK–Water spangles, Floating Moss, Floating Fern, water fern (Salvinia minima), floating leaves
RMRDYF89–. A textbook of botany for colleges and universities ... Botany. 172 MORPHOLOGY which becomes hard at maturity, forming a small nuiUke body called the sporocarp (fig. 396). In Salviniaceae, therefore, the sporocarp is a sorus invested by an indusium. Microsporangia and megasporangia. 400 399 Figs. 399, 400. — Azolla: 399, young sporocarp, showing a young megasporangium and the developing indiasium; the megasporangium has advanced to the cutting off of tapetal cells (0; 400, megasporocarp, showing the terminal megasporangium with one megaspore (m) surviving the degeneration of the others, and t
RMANWNJH–Bilobed Floating Moss, Bilobed Floating Fern, water fern (Salvinia biloba), floating leaves
RMRE3NB4–. A handbook of cryptogamic botany. Cryptogams. RmZOCARPE^E 33 ;se bodies are therefore developed entirely within the microspore, ile the microspores themselves are set free completely from the (range. As in the Salviniaceae, the whole of the contents of the ther-cell is not used up in the formation of the antherozoid ; a por- 1 remains behind in the form of a roundish turbid lump consisting of itoplasm and starch-grains, which gradually becomes clearer, and iches itself, in the form of a vesicle, to the antherozoid, which in alaria becomes soon detached, but in Marsilea remains attached to an
RMANWNKN–Floating Moss, Floating Fern, water fern (Salvinia auriculata, Salvinia rotundifolia), floating leaves with water drops
RFPBPKPC–Floating leaves of aquatic fern - Salvinia natans and leaves of frogbit Hydrocharis morsus-ranae
RMRDM97C–. 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. 3S SALVINIACEAE. Vol. I.. i. Salvinia natans (L.) Hoffm. Salvinia. Floating Moss. Fig. 87. Marsilea natans L. Sp. PI. 1099. 17 S3- Salvinia natans Hoffm. Deutschl. Fl. 2: 1. 1795- Leaves oblong, rather thick, obtuse or emarginate at the apex, rounded or cordate at the base, entire., spreading, 6-12' long, pinnately veined, bright green and papillose above, the
RFPBPKPG–Floating leaves of aquatic fern - Salvinia natans and leaves of frogbit Hydrocharis morsus-ranae
RMRD2PRA–. De flora van Nederland. Plants. 236 — SALVINIACEAE. — FAMILIE 8. Voorkomen in Europa en in Nederland. De plant komt in West-, Midden- en Zuid-Europa in moerassen en vijvers voor, ook wel aan droog geworden oevers van kleine meertjes en in uitgedroogde slooten. Zij is bij ons in vele streken vrij algemeen. Familie 8. Salviniaceae D. C Watervaren s. Sporenomhulsels eenhokkig, eenslachtig, de eene een uit vele micro- sporangiën bestaanden sorus bevattend, de andere met een sorus, die uit een veel geringer aantal macrosporangiën bestaat (soms slechts uit 1). De microsporen liggen in schuimachtig
RFPBPKPY–Floating leaves of aquatic fern - Salvinia natans and leaves of frogbit Hydrocharis morsus-ranae
RMRD2PR2–. De flora van Nederland. Plants. FAMILIE 8. â SALVINIACEAE. â 237 Voorkomen in Europa en in Nederland. De plant komt in Midden- en Zuid-Europa voor in stilstaande en langzaam stroomende wateren, vooral gaarne op houtvlotten. Zij is bij ons bij Zwolle en Leerdam gevonden. 2. Az()lla ) Lmk Azolla. Sporekapsels vliezig, eenhokkii.,^ meest niet openspringend. Zij bevatten 1-2 niacrosporangiën, deze zijn spits, eirond, bijna zittend , andere bevatten talrijke, bolronde, gesteelde microsporangiën. De sporekapsels zitten aan het ondergedoken bladdeel van het onderste blad van een tak en staan 2-4
RFPE3PWM–Floating leaves of aquatic fern - Salvinia natans and leaves of frogbit Hydrocharis morsus-ranae
RMRCRCN1–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Rhizocarpeae. Salviniaceae. 285 setzt. Auf dem Grunde von Landseen; selten. 6—9. I. echinospora Durieu. Blätter viel kürzer, hellgrün, schlaff. Macrosporen, dicht mit langen, dünnen, sehr zerbrechlichen Stacheln bedeckt; selten: in den SchAvarzwaldseen. Ordnung IX. Rhizocarpeae, WurzelMcMler. S. 273. Kleine, ein- oder mehrjährige auf dem Wasser schwimmende, daher auch Hydropteriden, Wasserfarrne, genannte, oder in feuch
RFPE3PWT–Floating leaves of aquatic fern - Salvinia natans and leaves of frogbit Hydrocharis morsus-ranae
RMRCRCMY–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. 286 RHzocarpeae. Salviniaceae. bei der Keimung 4klappig sich öffnenden, kugeligen, korkigen Sporangien- behälter stehen auf sehr kurzen Stielen neben den Blättern; zuweilen auf diesen. Sie enthalten innerhalb geschlossener Hüllen sitzende Gruppen von Sporangien, auf kissenf. Fruchtboden, die den Mittellinien der künfti- gen Klappen entsprechen, wodurch sie 4fäche- rig erscheinen. Jeder Sporangienhaufen be- steht,
RFPE3PWX–Floating leaves of aquatic fern - Salvinia natans and leaves of frogbit Hydrocharis morsus-ranae
RMRCGK2J–. Die Pflanzenwelt Afrikas, insbesondere seiner tropischen Gebiete : Grundzge der Pflanzenverbreitung im Afrika und die Charakterpflanzen Afrikas. Botany. Filicales. — Salviniaceae. 67 gambien. Einige andere Arten besitzen keinen Zahn am Sporocarp, nämlich die in Senegambien vorkommende JI. pygmaca A. Brongn. (= M. gyDinocarpa Lepr.) sowie J/. nnbica A. Br. in Kordofan, alles kleine, an ausgetrockneten Tümpeln wachsende Arten. Farn. Salviniaceae. Von dieser Familie der Unterreihe Hydropteridineae kommen beide hierzu gerechnete Gattungen in Afrika vor. Hydrophyten. Salvinia L. Nur eine der in
Search Results for Salviniaceae Stock Photos and Images (164)
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