PEA FAMILY 



x. Pod several-seeded, splitting; leaves 

 not dotted 

 (x) Flowers 1-2 in a cluster Lotus 



(y) Flowers several-many in a cluster Astragalus 

 y. Pod 1-seeded, not splitting; leaves dot- 

 ted with glands Psoralea 

 (2) Leaflets toothed 



(a) Flowers in long tapering racemes Melilotus 



(b) Flowers in loose spikes or dense heads, 



the latter rarely 2-few-rlowered 

 x. Flowers in loose spikes ; pods coiled or 



curved, often spiny Medicago 



y. Flowers in dense heads, rarely 2-few- 



flowered; pods straight Trifolium 



Leaves of 5-many leaflets 



(1) Leaflets dotted with glands 



(a) Leaves digitate, of 5 leaflets Psoralea 



(b) Leaves pinnate, of 5-many leaflets 



x. Pod with hooked prickles Glycyrrhiza 



y. Pod not prickly 



(x) Stamens 10; flowers pea-like Dalea 



(y) Stamens 5; flowers not pea-like Petalostemon 



(2) Leaves not dotted with glands 



(a) Leaves odd-pinnate, not tendril-tipped 

 x. Pod much narrowed between the seeds, 



Bat, necklace-like Hedysarum 



y. Pod not narrowed between the seeds 

 (x) Leaflets digitate, usually 5-11; sta- 

 mens 10, all united Lupinus 

 (y) Leaflets pinnate 

 m. Stamens 10. all separate from each 



other Sophora 



n. Stamens 10, 9 united into a tube 

 (m) Tip of the keel with a point or 



hook Aragalus 



(n) Tip blunt or rounded, not 



pointed or hooked Astragalus 



(b) Leaves even-pinnate, usually tendril- 



tipped 

 x. Style thread-like, hairy-tufted at or near 



the apex Vicia 



