. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. Order 160,â1TLICES. 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. fYuctification 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, 1-celled, con- taining
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. Order 160,â1TLICES. 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. fYuctification 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, 1-celled, con- taining numerous, minuto spores. An- theridia and iristillidia formed after ger- mination, on tho young plant (See figs. 491â501.) Genera '200, specie* 24)00.âA largo and in- teresting order of fluwerless plants, distin- guished for their elegant, plume-like foliage. They are usually a low inches to a few feet bigh, but some of tho tropical species, as tho Cyatheae of both Indies, arc 15â'25 feet high, Viuing with the palms in size and beauty. Properties.â Generally mucilaginous and mildly astringent, hence considered pectoral. Aspidium and Fteris arc anthelmintic. Os- regal is has been successfully adminis- tered for the rickets. Observation.âThe fructification 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 be interesting and '39 Polypodium vulgarc. 7U Frond. 741 Lobo of the frond enlarged, showing tho sori. 742 One of the sori enlarged, showing the spor- angia. 743 One sporange further magnified, bursting and discharging the spores. 744 Soma of Aspidium marginalo covered with tho indu- siutn. 745 Same, sido view. SUBOEDE11S AND GENEItA. § Frond eniilinc, solitary, straight in vernation. Stem erect, (a) § Fronds cauline, several, palmate (or radical and filiform), (b) â J Fronds all radical, clustered (never filiform), circinato in ve
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
