LEGUMINOS&. SILVA OF NORTH AMERICA. 117 
CONSPECTUS OF THE NORTH AMERICAN SPECIES. 
Flowers in globose heads, the peduncles bibracteolate at the apex; legume thick, pulpy, 
indehiscent. . 2. 2. 1 1. 1 ww ew ee ee ee eee eee eee 1 AL FARNESIANA, 
Flowers in elongated slender spikes ; legume compressed, straight or contracted between the 
seeds ; branches armed with stout recurved infrastipular spines. 
Legume broad, straight or slightly contracted between the seeds; seeds narrowly obovate 
OP OVS = tw we ee ee ee ee ee we eR ee we ee ew ZA WeicaTo, 
Legume narrow, often conspicuously contracted between the seeds; seeds nearly orbicular 3. A. GReEGGII. 
