LEGUMINOSyE 69 



6. Trifolium, leaves 3-foliate, flowers in heads, pods straight. 



7. Medicago, leaves 3-foUate, flowers in heads or short spikes, pod coiled or 

 curved. 



8. Melilotus, leaves 3-foliate, flowers in racemes. 



tt Leaves pinnately S-foliate. 



9. Amphicarpa, some tiny inconspicuous flowers at the base of the plant on 

 stems which are usually underground. 



ttt Leaves pinnately compotjnd of more than thkee leaflets. 

 t Leaves odd-pinnate, without tendrils. 



10. Astragalus, keel blunt-pointed. 



11. Ozytropis, keel ending in a sharp beak. 



12. Hedysarum, pod constricted between the seeds. 



13. Glycyrrhiza, pod covered with hooks. 



tt Leaves even-pinnate, the terminal leaflet being replaced 

 BY A tendril. 



14. Vicia, style slender, with a tuft of hair at the end. 



15. Lathyrus, style flat and bearded down the inner side. 



1. THERMOPSIS. 



Calyx 5-parted, or sometimes 4-parted. by the joining of the two 

 upper lobes; corolla papUionaeeous, the standard orbicular and about 

 equalling the wings and keel in length; stamens 10, incurved and 

 distinct; pod flat, sessile or on a short stipe. Perennial herbs with 

 palmately 3-fohate leaves, foUaceous stipules, and large showy 

 flowers in terminal or axillary racemes. 



1. T. rhombifdlia, (Nutt.) Richards. 



Erect or decumbent at the base, 6-15 in. high, silky-pubescent with fine 

 appressed hairs; leaves petioled, with broad leaf-like stipules; flowers large, 

 yellow, in terminal or axillary racemes of few flowers; pod usually strongly 

 recurved and stalked. Dry open ground, S-W, Man.-Alta. 



2. AMORPHA. 



Calyx 5-cleft, persistent; corolla wanting, except the standard, 

 which is wrapped d,bout the stamens and style; stamens 10, united 

 at the base, otherwise distinct; pod longer than the calyx, 1 or 

 2-?eeded. Shrubs with odd-pinnate leaves, the midrib of the leaflet 

 projecting; flowers purple, in a terminal spike. 



