308 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Subg. 2. Eumimosa, DC. (as modified by Benth.). Flowers perfect 
or polygamous: stamens in all equal in number to the lobes of the 
corolla. — Mém. Lég. xii. 418, & Prodr. ii. 425, in major part; Benth. 
Trans. Linn. Soc. xxx. 388, 389. 
* Pinne 1 pair; leaflets very large, ovate or ovate-lanceolate to obovate, 1 or 
more commonly 2 pairs upon each secondary rhachis, but the inner leaflet of 
the lower pair mostly much reduced or even wanting. — Series Sensitive, 
Benth. 1. ¢. 388, 390. 
+ Stem glabrous or in J. manzanilloana slightly strigose. 
++ Unarmed shrubs or trees. 
2. M. sesquijugata, J. D. Surra. Low shrub branched from 
the base: leaflets elliptic-oblong or lance-oblong, rounded or acutish at 
the apex, coriaceous and reticulate-veiny, glabrous and lucid above, 
appressed-setose but soon glabrate and glaucous beneath, 15 to 20 mm. 
long: petioles slender, essentially glabrous: peduncles downwardly 
strigose: flowers purplish, tetramerous. — Bot. Gaz. xiii. 74 (1888).— 
In rock-fissures near Santa Rosa, Dept: Baja Verapaz, Guatemala, 
altitude 1525 m., July, 1887, von Tuerckheim (no. 1327 of J. D. Smith’s 
valuable Guatemalan set). 
3. M. Goldmanii. Small tree, 3 to 6 m. high: glabrous through- 
out except for the setose-ciliate margins of the leaflets, stipules, and 
bracts: stems woody, covered with grayish brown bark: petioles fili- 
form; leaflets obovate-oblong, obtuse or rounded, mucronate, rather 
thin, green above, perfectly glabrous and slightly glaucescent beneath, 
12 to 18 mm. long, 6 to 8 mm. broad; margin ciliate with conspicuous 
appressed or incurved stramineous bristles ; rhachises devoid of bristles ; 
stipules subulate, attenuate, slightly ciliate: peduncles filiform, usually 
equalling or often exceeding the petioles, fascicled on short or wt 
veloped secondary axes; heads numerous, globose, 12 mm. in diameters 
flowers 4-merous, purplish white: legume unknown. — Collected by 
Nelson & Goldman between Juchitan and Chivela, Oaxaca, at 50 to 270 
m. altitude, 1895, no. 2628 (herb, Gray and herb. U. S. Nat. Mus): 
This species differs from any of the other Mexican and Central Amer 
can species of the Sensitive in its perfectly glabrous peduncles a 
petioles, also by having the lower surface of the leaflets devoid ‘ 
sete as well as any trace of pubescence. It is evidently near ae 
South American MZ. glaucescens, Benth. and M. angusta, Benth., oe 
these from description have larger leaflets and are woody only 
Nate ae Seg te ea eS” 
