ROBINSON. — SPECIES OF MIMOSA. 315 
++ ++ Spines numerous, small, recurved, somewhat 4-seriate : pinne 4 to 5 pairs: 
fruit 2 cm, broad 
/— 18. M. leptocarpa, Rosz. A straggling shrub with long lax 
glabrous branches: pinne 4 to 5 pairs, often alternate; leaflets 8 to 11 
pairs, oblong, obtuse, minutely puberulent (under lens) : legume 12 or 
15 cm. long, 2 em. broad; replum armed with a few short firm recurved 
prickles. — Contrib. U. S. Nat. Herb. i. 326. — Manzanillo, Palmer, 
no, 1341 (December, 1890). An anomalous species known only in 
fruit, so that even its generic affinities are subject to some doubt. Dr. 
Rose has found the remains of five stamens clinging about the base of 
the legumes. The fruit is of course extraordinarily large for Eumimosa, 
but seems to possess the distinctive characters of the genus, 
Subg. 8. Happasta, DC. (as extended by Benth.). Stamens twice 
as many as the lobes of the corolla. — DC. Mém. Lég. xii. 418 & 
Prodr. ii. 428; Benth. Trans. Linn. Soc. xxx. 389, 411. 
* Flowers in cylindrical lax or dense elongated or rarely (in M. adenantheroides) 
subcapitate spikes. — Leptostachye, Benth. 1. c. 389, 
+ Leaflets 1 to 5 rarely 7 pairs, elliptical, ovate, or obovate, not twice as long 
as broad. 
“+ Leaflets and younger parts tomentose or tomentulose. 
= Leaflets 15 mm. or more in length. 
19. M. spirocarpa, Rosrz. Showy tomentose shrub, sparingly 
armed with scattered spines: pinnw 2 to 4 pairs; leaflets 1 to (less 
frequently) 3 pairs, broadly obovate: short-peduncled spikes numerous, 
rather slender, 7.5 cm. in length, purplish turning white: corolla 5-lobed: 
pods small, light-colored, tomentulose, soon coiled through 1 to 14 
revolutions. — Contrib. U. S. Nat. Herb. iii. 316, t. 11. — Sinaloa, 
Culiacan, Palmer, no. 1476, H., and later between Rosario and Colomas, 
Rose, no. 1606. Notwithstanding the exceptional form of the fruit 
there can be no doubt that Dr. Rose has correctly determined the 
affinities of the species. 
20. M. guatemalensis, Bentu. Acnpeioreatang shrub armed | 
with a few scattered straight spines: pinne 38 to ; leaflets 3 to 
6 pairs, elliptical: spikes 5 cm. long on peduncles half as as longs flowers 
silky-villous: legume still unknown. — Bot. Sulph. 89, & in Hook, 
Lond. Jour. Bot. v. 89. Jnga? Guatemalensis, Hook. & Arn. Bot. 
Beech. 419.— W. Mexico, Cerro de Pinal, Seemann, Tepic, Barclay 
(acc. to Hemsl.), Lamb, no. 583, near Colomas, ose, no. 3200; Realejo, 
Nicaragua, Sinclair. 
