48 



VARIOUS FOOD-PLANTS 



Fig. 37. — Pea (Pisum sativum. 

 Pulse Family, Legumiiios(e) . 

 Plant in flower and fruit, niueli 

 reduced. (Nicholson.) — T h c 

 plant is an annual, climbing by 

 mean.s of tendrils which termi- 

 nate the leaves; stern and leaves 

 pale green, smooth and covered 

 with a delicate "bloom " which 

 easily rubs off; flowers, white, 

 bluish, purplish, or variegatcil. 



ri(i. 38.— Pea. A, flower. B, the 

 same halved. B', corolla, with 

 petals separated, showing 

 standard (e), wings (a, a), and 

 keel (c). C, the stamen-tube 

 and pistil, enlarged. D, pistil. 

 E, pod shedding seeds. F, a 

 seed, showing stalk (/), place 

 of minute opening, the mi- 

 cropyle, through which moi.s- 

 ture penetrates (m), raphe or 

 ridge (r) and chalaza or end 

 of ridge (c) ; G, embryo, laid 

 open, showing cotyledons or 

 seed-leaves (c), radicle or seed- 

 root (r), caulicle or seed-stem 

 (t), and plumule or seed- 

 bud (g). (Warming.) 



