578 / MIMOSACEAE 
oblong, 2.5-5 mm. long, mostly blunt: spikes globose, about 1.5 em. in diameter, the 
peduncle pubescent like the subtending rachis : pods broadly linear, 3-6 cm. long, 6-8 mm. 
wide, delicately veined, abruptly acuminate. 
In dry soil, Texas to Arizona. Spring and summer. 
4. Acacia constrícta Benth. A shrub, armed with spreading straight or slightly 
curved spines, the foliage often sticky. Leaves 3-6 cm. long, with 4-14 pinnae; leaflets 
12-20, the blades oblong, 1.5-2 mm. long, obtuse, nerveless: spikes globose, 8-10 mm. 
thick, on pubescent peduncles 1-2 cm. long: pods elongated, linear, constricted between 
the seeds, glabrous, 5-13 cm. long, each narrowed into a stipe. 
In dry soil, southern Texas to New Mexico, and adjacent Mexico. Spring. 
5. Acacia Roemeriana Schlecht. A stout shrub, with spreading branches, armed 
with stout prickle-like spines. Leaves 3-10 cm. long, with 4-6 pinnae ; leaflets 8-16, the 
blades oblong, oval or cuneate, 8-10 mm. long, oblique, apiculate or retuse at the apex, 
prominently nerved : spikes globose, 8-10 mm. thick, on glabrous peduncles 1-2 cm. long: 
pods flat, oblong or linear-oblong, 5-15 cm. long, slightly curved, each narrowed into a 
stipe, the valves prominently nerved near the edges. 
In dry soil, southern Texas, New Mexico and Mexico. Spring. 
6. Acacia Wrightii Benth. A shrub or small tree, with streaked branchlets armed 
with short prickles. Leaves numerous, 2-3.5 cm. long, usually with 4-6 pinnae; leaflets 
6-12, the blades oblong to obovate, 5-7 mm. long, often minutely pointed, prominently 
nerved beneath: racemes cylindric, 2-3 cm. long, not very dense: flowers slender-pedi- 
celled : pods 8-11 cm. long, 2-2.5 cm. broad, curved, often irregularly undulate along the 
margins. 
In dry soil, Texas, New Mexico and adjacent Mexico. Spring and summer. TEXAS CATSCLAW. 
7. Acacia Grégeii A. Gray. A shrub or small tree, commonly armed with short 
curved prickle-like spines. Leaves 2.5-5 cm. long, with 2-6 pinnae; leaflets 8-14, the 
blades firm, oblique, oblong to cuneate, 4-6 mm. long, apiculate, obtuse or truncate at the 
apex, prominently nerved : spikes long-peduncled, 2-4 em. long : pods flat, linear-oblong, 
8-12 cm. long, sometimes glaucous, irregularly constricted between the seeds. 
In dry or rocky soil, Texas and Mexico. Springand summer. DEVIL'SCLAWS. PARADISE FLOWER. 
CATSCLAW. 
8 Acacia amentacea DC. A glabrous shrub, with zigzag branches, armed with 
straight or slightly curved pale spines 1-2 cm. long. Leaves 1-2 em. long, with 2 pinnae; 
leaflets 4-8, the blades firm, obliquely oblong or obovate, 4-6 mm. long, truncate or retuse 
at the apex, prominently nerved: racemes oblong, 1-2 cm. long: pods linear, flat, 6-10 
em. long, curved, constricted between the seeds, usually acuminate at the apex, each attenu- 
ate at the base into a stipe. 
On hillsides, from the Guadalupe River to the Pecos, south to Mexico. Spring. 
7. VACHELLIA Wight & Arn. 
Shrubs or small trees, with spreading branches and straight spines. Leaves alternate : 
blades 2-pinnate, with 8-16 pinnae: leaflets numerous (20-50 in each pinna), relatively 
small. Flowers polygamous, in globular spikes. Calyx simulating the corolla hut only 
about 4 as long, shallowly 5-lobed. Corolla tubular-funnelform, shallowly 5-6-lobed, the 
lobes as broad as high. Stamens very numerous: filaments distinct. Ovary sessile : style 
filiform. Pod stout, turgid, nearly terete or usually broader than high, scarcely dehiscent, 
filled with a pulp which separates the two rows of seeds and the individual seeds from each 
other. HVUISACHE. CASSIE. 
l. Vachellia Farnesiàna (L.) Wight & Arn. A shrub or small tree, with eur 
ing branches and straight spines 5-15 mm. long. Leaves 1-2.5 cm. long, with en 
pinnae; leaflets 20-50, the blades linear-oblong, 2-4 mm. long, rather obtuse: §p} ^g 
globose, 8-12 mm. in diameter, on pubescent peduncles 1-2 em. long : pods cylindric, de 
7.9 em. long, straight or slightly curved, often slightly constricted between the seeds. 
[ Acacia Farnesiana (L.) Willd.] 
pring, fruit ripe 
On plains and prairies, southern Texas and Mexico, also naturalized in Florida. $S 
insummer. YELLOW OPOPANAX. 
8. LEUCAENA Benth. ue 
Evergreen shrubs or trees, usually unarmed. Leaves alternate: blades pu 
petioles often furnished with a gland, the leaflets subtended by setaceous stipels : lea 
