. Class-book of botany : being outlines of the structure, physiology and classification of plants : with a flora of the United States and Canada . Botany; Botany; Botany. Oeder 160.—FILICES. 815 Order CLX. FILICES. Ferns. Stem a perennial, creeping, horizontal rhizome, or sometimes erect and arbores- cent Fronds (fruit-bearing leaves) va- riously divided, rarely entire, with forked veins, and mostly circinate vernation. Fruciificaiion occupying the back or mar- gin of the fronds, arising from the veins. Sporangia (spore-cases) of one kind, scat- tered or clustered in sori, l-celled, con- taini
. Class-book of botany : being outlines of the structure, physiology and classification of plants : with a flora of the United States and Canada . Botany; Botany; Botany. Oeder 160.—FILICES. 815 Order CLX. FILICES. Ferns. Stem a perennial, creeping, horizontal rhizome, or sometimes erect and arbores- cent Fronds (fruit-bearing leaves) va- riously divided, rarely entire, with forked veins, and mostly circinate vernation. Fruciificaiion occupying the back or mar- gin of the fronds, arising from the veins. Sporangia (spore-cases) of one kind, scat- tered or clustered in sori, l-celled, con- taining numerous, minute spores. Ari- theridia and pistillidia formed after ger- mination, on tho young plant. (See figs. 491—501.) Genera 200, specieii 2000.—A Large and in- teresting order of floworli'ss plants, distin- guished for their elegant, plume-like foliage. They are usuMlly a i'e^v inches to a few feet high, but some of tlie tropical species, as tho Cyatheffi of both Indies, are 15—25 feet high, vicing with the palms in size and beauty, Propertieft. — Geuprnlly mucilaginous and mildly astringent, licnco pectoral. Aspiclium and Pteris are nnthelinintic. Os- munda regalis has been successfully adminis- tered for the rickets. Ohs6r-vniio7t.—The fructiiication of the ferns, with its various appendages, is too minute to be well observed by the naked eye; but an oxamination of it with the aid of a good lens cannot fail to bo Interesting and 739 Polypodium vnlgare. TiO Frond, 741 Lobe of the frond enlarged, showing tho eorl. 742 One of the sori enlarged, showing tho spor- angia. 748 One sporange further magnified, bursting and discharging the spores. 744 Borua of Aspidium marginalo covered with the indu- sium. 745 Same, side view. SUBORDERS AND GENERA. § Frond catiline, solitary, straight in vernation. Stem erect, (a) § Fronds caulino, several, palmate (or radical and filiform), (b) S Fronds all radical, cl-ustered (never filiform), circ
Size: 1251px × 1997px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublisher, booksubjectbotany
