. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 342 FRUITS AND SEEDS seed.) In some cases, as in corn, the cotyledon may de- velop into an absorbing organ, drawing nourishment from the rest of the seed. (See Figure 149) Usually a scar may be found on the surface of a seed indi- cating the point at which it was attached to the ovary. This scar may be readily found in the bean. It is called the hilum. When the seed is mature, the embryo is usually differen- tiated into the following parts: cotyledons, hyp
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 342 FRUITS AND SEEDS seed.) In some cases, as in corn, the cotyledon may de- velop into an absorbing organ, drawing nourishment from the rest of the seed. (See Figure 149) Usually a scar may be found on the surface of a seed indi- cating the point at which it was attached to the ovary. This scar may be readily found in the bean. It is called the hilum. When the seed is mature, the embryo is usually differen- tiated into the following parts: cotyledons, hypocotyl (the word below the cotyledons), -Embryo and seedlings of ^nd plumulc (or epicotyl, that The two large cotyledons . word meamng above the cotyle- dons). (Study Figure 150 and its explanation.). means Fig. ISO. bean. entirely fill the seed; there is no endosperm. A, embryo removed from the testa; the colorless testa slips off easily after beans have been soaked in water. B, the embryo split open; it separates readily into the two cotyledons, revealing the rest of the young plant lying be- tween them; h, hypocotyl; p, plu- F. sions have Cotyledons and the Divi- of Seed Plants. You noted that one of the mule. C, young seedling, showing cotyledons, hypocotyl, plumule, and radicle; the hypocotyl is the part of the embryo below the attachment of the cotyledons; the plumule is the bud be- tween the cotyledons; it is sometimes called the epicotyl; its outer part unfolds and forms the first true leaves; the root part of the embryo, indicated by the Uttle rootlets arising from it, is called the radicle; it is a part of the hypocotyl. D, an older seedling showing the first internode (above the coty- ledons), and the first true leaves; nourishment is still being drawn from the 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 rese
Size: 1136px × 2199px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
