. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. n someof them, and by their undoubted re-semblance to the Duckweeds. Itisremarkable that Adanson was awareof this relationship between Arads and Naiads, to which, however, Jussieu, whoseNaiades are a very heterogeneous assemblage, did not assent. The species of the Order,as now cucumscribed, are generally translucent cellular plants, destitute of stomates,having no epidermoidal layer, and perishing rapidly upon exposure to au\ Amici hasseen the sap circulate in the transparent
. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. n someof them, and by their undoubted re-semblance to the Duckweeds. Itisremarkable that Adanson was awareof this relationship between Arads and Naiads, to which, however, Jussieu, whoseNaiades are a very heterogeneous assemblage, did not assent. The species of the Order,as now cucumscribed, are generally translucent cellular plants, destitute of stomates,having no epidermoidal layer, and perishing rapidly upon exposure to au\ Amici hasseen the sap circulate in the transparent joints of Caulinia fragilis, which he states isthe unknoAvn plant upon which Corti made observations relating to the same Amici in Ann. des Sc. 4. 42. Mr. Griffith has remarked that, although the differ-ence between the development of the vegetable carpel leaf and vegetable ovulum is ingeneral sufficiently apparent, an exception has appeared to him to be presented by Naias,in which the future pistil seems to be derived from an annular growth round a centralbody, which subsequently becomes the ovule !. Fig. XCIV. Fig. XCIV,—Zannichellia palustria. 1. A flower ; 2. a cluster of ripe ovariesto exhibit the o\iile ; 4. a vertical section of a seed, showing the folded up embryo. 3. an ovary opened 144 NAIADACEtE. [Endogexs. Common in extra-tiopical countries, either inhabiting fresh water, or the shores of theocean, but also found near the equator,Theu uses are imknow-n. GENERA. Phyllospadix, Hook. I Tetroncium, W. Althenia, Petit. Zannichellia, Michel. Cathanthes, Rich. Bellevalia, Delil. Lila;a, ^. Halodule,-EhcZ^. EpigjTianthus, BiM?^. Heterostylus, Hook. I Biplanthera, Thouars. Numbers. Gen. 9. Sp. 16. Caulinia, Willd. Ittnera, , Willd. Fluvialis, Michel —Hydrocharidaceae—Naiadace>e.— Hydrales.] ZOSTER ACE^, 145 Order XLI. ZOSTERACEiE.—Sea wracks. Zosteimx.—Necs ab —Zostete
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