. Beginners' botany. Botany. and the plant straightens and the cotyledons expand. These coty- ledons, or " halves of the bean," persist for some time (b, Fig. 19). They often become green and probably perform some function of foliage. Because of its large size, the Lima bean shows all these parts well. Germination of Castor Bean. — In the castor bean the hilum and micropyle are at the smaller end (Fig. 20). The bean " comes up" with a loop, which indicates'that the hypocotyl greatly elongates. On examining germi- nating seed, however, it will be found that the cotyledons ar
. Beginners' botany. Botany. and the plant straightens and the cotyledons expand. These coty- ledons, or " halves of the bean," persist for some time (b, Fig. 19). They often become green and probably perform some function of foliage. Because of its large size, the Lima bean shows all these parts well. Germination of Castor Bean. — In the castor bean the hilum and micropyle are at the smaller end (Fig. 20). The bean " comes up" with a loop, which indicates'that the hypocotyl greatly elongates. On examining germi- nating seed, however, it will be found that the cotyledons are contained inside a fleshy body, or sac (a, Fig. 21). This sac is the endosperm. Against its inner surface the thin, veiny coty- ledons are very closely pressed, ab- Fig. 19. — Germination of Bean. Fig. 20. — Sproutv [NG of Castor Fig. 21. — Germina- tion of Casi or Bean. Fig. 22. Castor Be \.\. Endosperm at a, a; coty- ledons at 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan company
Size: 2110px × 1184px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
