40 



VARIOUS FOOD-PLANTS 



Fui. 2N. — Butternut {Juglans cinerea, Waluut Family, Ju5?Za«'/acea?). A twig 

 in autumn bearing a single leaf and a ripe fruit. Twig, in spring bear- 

 ing two staminate flower-clusters. A single starainatc flower viewed 

 from above. A pistillate flower showing the two protruding stigmas. 

 A nut removed from its husk, showing the deeply sculptured shell. 

 The flowers, enlarged; the other parts reduced. (Britton and Brown.) — 

 The plant is a forest tree becoming sometimes .30 m. tall; old bark 

 roughish, gray; young twigs and leaves sticky-hairy; flowers brownish 

 green; stigmas red; fruit green turning to brown, covered thickly with 

 verj- sticky hairs, nut l)lackish. 



Fig. 29. — Pecan (Carya olivcEformis, Walnut Family, Juglandacece). Twig 

 in spring after removal of all the leaves but one and all the staminate 

 flower-clusters below it except the lowor piirt of their stalks. At the 

 tip of the twig is the small cluster of pistillate flowers. Three-branched 

 staminate llower-cluster. Staminate flower, top view. Stamen. 

 Fruit. Nut, after rcmo\al of the husk. Flower and stamen, enlarged. 

 (Britton and Brown.) — The plant is a large slender tree, becoming 

 50 ni. tall; bark somewhat rough; young twigs and leaves hairy; mature 

 foliage nearly smooth; flowers greenish; fruit brownish green; nut 

 light brown. 



The native home of the various nuts and of other food- 

 plants, the length of time they have been cultivated, and 

 certain other matters of related interest, will be discussed 

 at the end of this chapter. 



34. Pulse, under which name are included peas (Figs. 37, 



38), and beans (Figs. 39, 40), 'agree with grains and nuts 



' In the reforencp to the illustrations the reader will ob.serve that the 

 same Arabic numeral sometimes applies to more than one cut, Roman 



