. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. irrognlar lol)C(l Ixxly, spurin^^'ly fnrnisluMl on its iinilnr aur- fuco villi sniiill ; TIm^ antii(M"i(lia and anlu^j^'onia appear to Ix; pioduccd on tlio iippca' sur- face, and tlics(! ])y tlusir inicn-action, give viso to tlu! now plant wliicli bears the .s]i(»rt's, just as in tlm Kerns and Horse- tails ; so that a^ain i]irn\ is an alternation of generations. 335. It is
. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. irrognlar lol)C(l Ixxly, spurin^^'ly fnrnisluMl on its iinilnr aur- fuco villi sniiill ; TIm^ antii(M"i(lia and anlu^j^'onia appear to Ix; pioduccd on tlio iippca' sur- face, and tlics(! ])y tlusir inicn-action, give viso to tlu! now plant wliicli bears the .s]i(»rt's, just as in tlm Kerns and Horse- tails ; so that a^ain i]irn\ is an alternation of generations. 335. It is a fact of great interest that Fi),'. 238. i>> soinc! ])lants nearly related to the Club- Mosses, f/ro /.vV/r/.s'(»r spores—large and small—are produced in soparat(^ sporangia. Tlu; largo on(!S d(;volopo prothallia ui)on Avliich arehegonia are formed, and the smaller others upon which antheridia api)ear. 330. The three plants just considered, while evidently differing in certain details of structure and in general aspect, nevertheless have a number of characters in common : 1. TJicy arjree in their nindo. of reproduction^ tvhich is hf/ sporesj the.^e bodies heimj quite unlilce the skkds with which wr. arc now familiar^ and which, you will recollect^ alwaf/s con fain the embryo of the new plant. 2. They all ej'hihit an alternatiou of generations, 3. They all ham true roots, ' 4. The three tissue-systems—the epidermal, the fihro- vascular, and the fundamental—thouyh not all developed to so high a degree as in the Phanerogams^ still can be very clearly made out in both roots and ste)ns. The fihro-vascular bundles are always closed, as in monocotyledons, arul are, as a gewral rule, concentric (299). Fig. 238.—Leaf of Lijcojtodium bearin<f pporangium ; greatlj' ui.^ginfied. ;;Thom6.). 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
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Keywords: ., book, bookcentury1800, booksubjectbotany, booksubjectplantanatomy
