. Botany for high schools and colleges. Botany. G TMNOHl'BJilM^JS. 405 the first root of the its whole root sys- tem. The cotyle- dons having thus far been in contact with the e n d 0 - sperm, which fur- nished them with nourishment, now elongate and push out their bases, and in some cases even- tually withdraw themselves entirely from the seed coat (Fig. 300, ///.). The apex of the axis (plumule) be- gins a rapid growth, which gives rise to a leafy stem resem- bling that of the parent plant, al- though usually somewhat simi:)ler. 515.—The tis- sues of the Gymno- sperms are individ- ually but
. Botany for high schools and colleges. Botany. G TMNOHl'BJilM^JS. 405 the first root of the its whole root sys- tem. The cotyle- dons having thus far been in contact with the e n d 0 - sperm, which fur- nished them with nourishment, now elongate and push out their bases, and in some cases even- tually withdraw themselves entirely from the seed coat (Fig. 300, ///.). The apex of the axis (plumule) be- gins a rapid growth, which gives rise to a leafy stem resem- bling that of the parent plant, al- though usually somewhat simi:)ler. 515.—The tis- sues of the Gymno- sperms are individ- ually but little high- er than those of the Pteridophytes, but in the mode of their aggregation they present great and important differ- ences, in this latter respect bearing a close resemblance to the tissues of the Dicotyledons among new plant, and eventually gives rise to. Fiff. 300.—Seeds of Finns Pinea in different stages of germination. /., ripe seed in loni^itiidiiia] section; a, the si-edcoat ; e, endosperm ; }o. the ; coryiedoiiary axis of embryo ; c, cotyledons ; y. the inicropylar end of the seed, with the root of the embryo directed to- wards it. //., J/., four views of the beginning of ger- mination ; A^ external view ; B^ with half of the seed ciiat removed; C, in lotigitiidiual section; /), in transverse section; y, seed coat; ?', red membrane lin- ing the seed coat; e. endo-^perm ; c, cotyledons ; w, root; X, ruptured embryo sue. ///., germination com- plete, the cotyledons, c, unfolding, and the hypoctyle- donary stem. Ac, elongating ; w, the main root, devt-l- oping lateral roots, («'.—After Sachs. the Angiosporms, The three tissue sys-. 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 perfectly resemble the original Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1885
