582 MIMOSACEAE 
nently nerved: peduncles surpassing the subtending bracts: pods linear, 3-6 cm. long, 
curved, mostly unarmed, the segments often 5-8. 
In dry soil, Texas and New Mexico. 
4. Mimosa Texana (A. Gray) Small. A low rigidly branched shrub, with finely 
pee or puberulent foliage, armed with subaxillary spines, the branches zigzag. 
eaves inconspicuous, with 4-6 approximate pinnae, or rarely only a pair, the rachis 
pubescent ; leaflets usually 8-14, the blades oblong, 2-4 mm. long, veiny, ciliolate: pedun- 
cles becoming 1-2 em. long: pods broadly linear, 2-3 cm. long, not constricted between 
the seeds, but well armed around the margin. 
On plains and prairies, Texas to New Mexico and adjacent Mexico. 
5. Mimosa Lindheimeri A. Gray. A puberulent shrub or small tree, armed with 
flattened spines beside and slightly below the axils, the branches zigzag. Leaves numer- 
ous, with 8-12 pinnae ; leaflets 16-24, the blades oblong, 2-3 mm. long: peduncles shorter 
than the subtending bracts: spikes globose, fully 1 cm. in diameter: pods linear, curved, 
2-4 cm. long, 3-4-jointed, glabrous, the margins armed with recurved prickles. 
In dry soil, western and southern Texas. 
6. Mimosa malacophylla A. Gray. A shrubby climber, with stems and branches 
1-5 mm. long, armed with recurved prickles, tomentose. Leaves numerous, with 8-14 
pinnae; leaflets relatively few, the blades oval to obovate, 6-16 mm. long, more or less 
oblique, rounded or apiculate at the apex : peduncles 1-1.5 em. long: spikes oblong, 1.5 
em. long, white or yellowish: pods broadly linear, 5-7 cm. long, curved, 6-8-jointed, 
glabrous, veiny. 
In dry soil, Texas to New Mexico and Nuevo Leon.—The form with merely puberulent stems and 
branches and rather larger glabrous leaflets is M. malacophylla glabrdta Benth. 
7. Mimosa Berlandiéri A. Gray. A sparingly strigose upright shrub, with sparingly 
prickle-armed branches. Leaves 3-6 cm. long, with 8-12 pinnae; leaflets numerous, 
40-80, the blades linear or linear-oblong, 4-5 mm. long, acute: peduncles shorter than 
the subtending bracts: spikes oblong or ovoid, 12-14 mm. long: pods linear-oblong, 
slightly curved, 4-9 cm. long, with 8-15 joints, rough-pubescent, each narrowed into a 
short stipe. 
In low ground, southern Texas to San Luis Potosi. 
8. Mimosa strigillosa T. & G. A perennial herb, with radially prostrate often creep- 
ing branches, the foliage more or less densely pubescent with rigid strigose hairs: leaves 
numerous, with 10-16 pinnae ; leaflets 20-28, the blades oblong or linear-oblong, 4-6 mm. 
long, obtuse or acutish, reticulated : peduncles surpassing the leaves: spikes pink, oblong, 
ae em. long: pods oblong or oval, 1-3 cm. long, 1-4-jointed, hispid, very oblique at 
the apex. 
On river banks and in moist soil, chiefly near the coast, Florida to Texas. 
12. NEPTUNIA Lour. 
Perennial herbs or shrubby plants, with unarmed prostrate or diffuse stems, or some 
times floating. Leaves with 2-pinnate blades: leaflets relatively small. Flowers perfect 
or polygamous, in head-like or cylindric spikes on solitary axillary peduncles. Calyx 
5-lobed. Corolla of 5 distinct or partially united petals. Stamens 10, or rarely 5, 
exserted : filaments distinct. Ovary stipitate. Ovules several. Pod relatively broad, flat, 
oblique, 2-valved. 
Spikes about 50-flowered, oblong-cylindric. 1. N. lutea. 
atre EON: DA ed or oval. 
racts and calyx-lobes ciliolate. 
Pinnae 4-6 : leaflets merely ciliolate. 2. N. poar 
Pinnae 6-10: leaflets ciliolate and pubescent beneath. 3. N. Lin dana. 
Bracts and calyx-lobes not ciliolate. 4, N. Flori : 
1. Neptunia lütea (Leavenw.) Benth. Stems branched at the base, the branche 
prostrate, 5-15 dm. long, somewhat shaggy pubescent, usually branching : leaves bi 
6-10 pinnae ; leaflets 18-34, the blades crowded, oblong, apiculate, ciliate, pon 
nerved beneath : stipules ovate-lanceolate: peduncles finally longer than the subten hee 
bracts: spikes oblong, 1-2 em. long, usually nodding: pods oblong, 2-4 cm. long, hr 
abruptly pointed, contracted into a rather slender stipe often 8 mm. long: see z tue 
In moist or clay soil, Arkansas and the Indian Territory to Florida and Texas. Spring samti. ) 
pr iia Texan form with nearly or quite glabrous branches and peduncles is N. lutea ténuis ( 
obinson. : 
2. Neptunia pubéscens Benth. Stems branched at the base, the branches 24 € 
long, spreading or trailing, sparingly pubescent: leaves usually with 4-6 pinnae; 
