W102 



ASPEN PEAVINE 

 La'thyrus leucan'thus 



Flowers white, yellowish or yellow, in 2- to 

 many-flowered clusters (racemes) arising from 

 axils of middle leaves, with 5 dissimilar petals 

 forming a pea-h'Ke bloom about K in- long 



Upper petal (banner) broader than others 

 2 middle petals usually shorter than upper one- 

 2 lowest petals (keel) united, boatlike, curved 



Stamens 10, in 2 groups of 9 and 1, enclosed in 

 the keel, their threadlike stalks united into a 

 tube which is squarely cut across the top 



Outer united flower parts (calyx) about K as 

 long as petals, green, deeply 5-toothed, the lower 

 teeth somewhat longer than upper 



A. Stalk (style) of seed-producing organ 

 (ovary), flattened toward the tip, with white 

 hairs along only one side. B. Illustrates the 

 style of the very similar vetches (Vicia spp.) 



Leaves alternate, divided, stalked; midrib ex- 

 tended into a tendril, often much reduced 



Leaflets 2 to 4 pairs (rarely more), oval, up to 

 2 in. long, hairless, veiny, abruptly sharp-pointed 



Leaflike bracts (stipules) 2, at base of leaf- 

 stalks, each shaped like half an arrowhead, about 

 % as long as leaflets 



Stems more or lass 4-sided, usually erect, 

 sometimes trailing 



Rootstocks underground, slender, somewhat 

 spreading 



Taproot slender, somewhat woody at top. 

 Pod (legume) hanging, broadest toward tip 



