20 



Key 



Page 



r. Flowers spurred Capnoides — 83 



s. Flowers not 

 spurred. 



(a) Leaflets 1—3. 



( 1 ) Leaflet 1 Dolicholus— 108 



(2) Leaflets 3 Melilotus— 101 



(b) Leaflets more 

 than 3. 



(m) Flowers in 

 a compound 



umbel Phanerotaenia — 154 



(n) Flowers in a 

 spike. 



(1) Stamens 5 Petalostemon — 107 



(2) Stamens 10 Parosela — 105 



(0) Flowers 

 neither in a 

 spike nor an 



umbel Ranunculus — 80 



2. Flowers brown or red- 



dish-brown, 

 m. Vine or stems pros- 

 trate and spreading Psoralea — 105 



3. Flowers white or tinted 



with green, pink, blue 

 or purple, 

 m. Shrubs. 



(x) Stems prickly. 



a. Leaflets 3—5 Rubus— 90 



b. Leaflets more 



than 3—5. 



(1) Flowers 



small, clustered Xanthoxylum— • 



(2) Flowers 

 large, 1V 2 — 2" 



across Rosa — 91 



(y) Stems not prickly 

 a. Leaflets 3. 



(1) Leaflets en- 

 tire . . i Ptelea— 118 



(2) Leaflets not 



entire Rhus— 127 



