Mimosa polyantha Benth.

Mimosa polyanthoides B. L. Robinson, Proc. Bost. vSoc. Nat Hist. 31:260. 1904.
A shrub, 3-5 m. high, the twigs angled, glabrous, with a few, flattened, reflexed prickles. Leaves 1.5 dm. long; petioles 2-3 cm. long; pinnae 4-7 pairs; leaflets 13-17 pairs, oblong, 8 mm. long, obtuse, glabrous; flowers in spikes; legume oblong, 5-6 cm. long, 10-13 mm. wide, longapiculate, about 8-jointed, long-cuneate at base, stipitate, the valves and margin loosely long-setose.
Type locality: Above Iguala, Guerrero. Distribution: Guerrero.

Mimosa polyantha Benth. Journ. Bot. Hook. 4: 410. 1842
?Acacia prosopoides DC. Prodr. 2: 460. 1825.
Mimosa polyantha Uvior B. L. Robinson, Proc. Am. Acad. 33: 318. 1898.
A shrub, the twigs pubescent or glabrate, prickly or unarmed. Prickles solitary or in
pairs, recurved; pinnae 2-5 pairs, rarely 1 pair; leaflets 5 or 6 pairs, oblong, 3-6 mm. long,
1-1.5 mm. wide, obtuse, puberulent beneath but soon glabrate; spikes 2-4 cm. long; flowers
glabrous; legume 3-5 cm. long, 8-10 mm. wide, short-stipitate, 4or 5-seeded, more or less
setose, or unarmed, glabrous.
Type locality: Mexico. Distribution: Sinaloa; Puebla; Oaxaca.

Mimosa setigera Britton & Rose, sp. no v
A low shrub, the twigs terete, glabrous, with few prickles, or none. Pinnae 2-5 pairs; leaflets 4-10 pairs, oblong, 3-5 mm. long, 1.5-2 mm. wide, rounded or acutish, glabrous; flowers in axillary spikes about 5 cm. long; calyx pinkish, 3or 4-lobed, glabrous; corolla 3or 4-lobed, glabrous; stamens 6 or 8, about 7 mm. long; legume sessile or nearly so, oblong, 3-4 cm. long, 6-8 mm. wide, short-apiculate, the margin and valves setose, othei-wise glabrous.
Rosario, Sinaloa, April 14, 1910, Rose, Standky & Russell 14553.

Mimosa stipitata B. L. Robinson, Proc. Bost. Soc. Nat. Hist 31:261. 1904.
A shrub, 3-5 m. high, the twigs at first pubescent, often purplish, prickly or unarmed. Petioles 1-1.5 cm. long; pinnae 4-7 pairs; leaflets 7-10 pairs, oblong, 5 mm. long, 1.5-2 mm. wide, acutish, glabrous, or ciliate; spikes 2-3 cm. long; flowers white, glabrous; legume oblong, 4-5 cm. long, 1 cm. broad, apiculate, glabrous, with a slender stipe 5-10 mm. long.
Type locality: Near Iguala, Guerrero. Distribution: Guerrero; Puebla; Morelos.