. Pharmaceutical botany. Botany; Botany, Medical. 54 PHARMACEUTICAL BOTANY ^E A. Fig. 31.—Section o£ a grain of wheat. A, Pericarps and seed coats; B, layer of cells in endosperm containing aleurone grains; C, cells of the endosperm containing starch grains. (From Hamaker.) seminated by wind currents. Examples of these are seen in the Milk- weed, which has a tuft of hairs at one end of the seed called a Coma, and in the official Strophanthus, which has a long bristle-like appendage attached to one end of the seed and called an awn. The wart-like appendage at the hilum or micropyle, as in Casto
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