KEY TO THE WILD FLOWERS OF SAN ANTONIO 



AND VICINITY 



Page 



PLANTS WITHOUT LEAVES. 



1 Stems red, orange, or yellow Cuscuta — 166 



II. Stems thick, fleshy, covered with spines Opuntiaceae — 142 



PLANTS WITH LEAVES. 

 I. Leaves compound. 



A. Leaves palmately compound. 



i. Leaflets generally 3, sometimes 

 4 or 5. 



a. Flowers yellow. 



x. Shrub, leaflets 3, spine- 

 toothed Berberis — 82 



y. Vine, leaflets usually 4 Zornia — 110 



z. Plant neither a shrub 



nor a vine Oxalis — 114 



b. Flowers white or tinged with 

 pink, green, blue or purple, 

 x. Shrub. 



m. Prickly shrub with 



trailing branches Rubus — 90 



n. Shrub not prickly. 



(1) Leaflets entire Ptelea— 118 



(2) Leaflets not en- 

 tire Schmaltzia — 127 



y. Vine with tendrils Cyclanthera — 202 



z. Plants neither shrubs 

 nor vines. 



m. Flowers bonnet- 

 shaped Psoralea — 104-5 



n. Flowers not bonnet- 

 shaped. 



(1) Petals 4, 



stamens 6 Nasturtium — 86 



(2) Petals 5. 



r. Leaves ill- 

 scented Polanisia— 88 



s. Leaves not ill- 

 scented Geum — 90 



c. Flowers brown or reddish- 

 brown. 



