24 



Key 



Page 



(2) Leaves 4—16" 



long Sesbania— 102 



2. Leaves twice-pinnate. 



x. Leaves with odd leaflet 

 at end. 



1. Flowers yellow or 



orange or green. 



m. Thorny shrub Parkinsonia— 98 



n. Vine Ampelopsis— 133 



o. Plants neither shrubs 



nor vines Phanerotaenia — 154 



2. Flowers white or tinted 



with pink, blue or 

 purple. 



m. Vine Cardiospermum — 129 



n. Plants not vines. 



(1) Flowers clustered 



in umbels Ammiaceae — 152 



(2) Flowers solitary. 



not clustered Anemone— 79 



3. Flowers blue to purple. 



(1) Petals many Anemone— 79 



y. Leaves without odd leaf- 

 let. 



1. Flowers yellow, 

 m. Shrub. 



(1) Flowers in 



spherical clusters Vachellia — 94 



(2) Flowers not in 



spherical clusters Parkinsonia — 98 



2. Flowers white, 

 m. Shrub. 



(x) Branches thorny 

 or prickly. 



r. Prickles recurved Acacia — 92-3 



s. Prickles not re- 

 curved 



(1) Leaflets 



about 1" long Prosopis — 96 



(2) Leaflets less 



than 1" long Acacia — 93 



(y) Branches not 



