116 Bulletin of the Unversity of Texas 
4. ACACIA (Tournefort) Adamson. The Acacias. 
Thorny trees with alternate evenly bipinnate leaves, nu- 
merous pinnae and numerous leaflets. Flowers in globose 
heads, or cylindrical racemes. Fruit an elongated, flat or 
eylindrieal pod. 
Flowers in elongated spikes or racemes. 
Pods-only«shehtly, curved: 3.45 ae oe 1. A. Wrightii. 
Pods much curled: and: contorted 7 )< -.... ss.6 se 5 2. A. Greggii. 
Plowers-in elobilar Meads... > a> ale kee Pee nee 3. A. Subtortuosa. 
1, Acacia Wrightii Bentham. Cat’s Claw. <A small wide 
topped tree, sometimes 25° high, with furrowed bark; striated, 
angular branchlets, and short curved spines. Leaves evenly 
bipinnate with 2-6 pinnae; leaflets 6-12, sessil, firm, lght 
green, hairy, with prominent veins. Flowers borne in racemes 
in the axils of the leaves, yellowish, fragrant. Fruit a flat- 
tened, almost straight pod constricted between the seeds. 
Western Texas to Mexico. 
The wood is close grained, hard, used for fuel. 
2. Acacia Greggii A. Gray. Paradise Flower. Devil’s 
Claw. <A small, thorny tree 20°-30° high with stout reddish 
brown zigzag branchlets and hairy twigs. leaves evenly 
bipinnate, pinnae 2-6, leaflets 8-14, thick, firm, light green. 
Fruit a very much contorted flattened pod constricted between 
the seeds. In the ravines from the valley of the San Saba 
River to the Devil’s River and south to Mexico. 
3. Acacia subtortuosa Shafer. Rio Grande Acacia. A 
small round topped tree 18°-20° high or a shrub, with dark 
brown fissured bark, zigzag branches, hairy twigs and light 
gray spines. Leaves evenly bipinnate, pinnae 6-8, leaflets 9-14 
pairs. Flowers in globose heads, in axillary clusters of 1-3, 
fragrant, bright yellow. Fruit a straight shghtly flattened 
pod, somewhat constricted between the seeds. Along the Rio 
Grande River, southwestern Texas and adjacent Mexico. 
5. HARVARDI Small. Huajillo. 
1. Havardia brevifolia (Benth). Small. A small, evergreen 
tree with erect branches, thin gray bark and short curved 
