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spherical heads. . . . Petalostemon — 106 

 (2) Flowers not 

 in spherical 



heads Nasturtium — 86 



c. Leaflets 17— 33. Astragalus— 103 



4. Flowers pink to red or 



magenta, 

 m. Shrubs. 



(1) Leaflets 3—7... Ungnadia— 130 



(2) Leaflets 11—15. Sophora— 100 



n. Vines or plants with 



prostrate stems. 



a. Leaflets 3. 



(1) Flowers moroc- 

 co-red Psoralea— 105 



(2) Flowers pur- 

 plish Lespedeza — 108 



b. Leaflets more than 



3. 



(1) Leaflets white- 

 margined . Cracca — 102 



(2) Leaflets not 

 white-margined Indigof era — 101 



o. Plants neither shrubs 

 nor vines. 



(1) Stems square, 



corolla scarlet.. Salvia — 186 



(2) Stems not square, 



corolla not scar- 

 let Parosela— 106 



5. Flowers blue to purple, 

 m. Shrubs. 



(1) Leaflets ever- 

 green, leathery Sophora — 99 



(2) Leaflets not 



leathery Amorpha — 111 



n. Vines or stems pros- 

 trate, 

 a. Leaflets 3. 



(1) Pod 1-seeded. Lespedeza — 108 



(2) Pod more than 



1-seeded Strophostyles — 109 



