ROBINSON: CONTRIBUTIONS FROM GRAY HERBARIUM. 257 
“* * * Capitula plus minusve pedicellata in panicula cymosa vel corymbosa vel 
(in M. hirsutissima) obscure racemosa disposita 
+ Caulis fulvo hirsutissimus ; capitula in apicibus paniculae ramorum 
subracemosa 
8. M.urrsutissma, DC., Prodr., v, 200 (1836).— On mountains, 
Velirla of Copey, alt. 1800-1900 m., April, 1898, Ad. Tonduz, no. 
12,208. A South American species. 
+ + Caulis plus minusve pubescens, vel cctemregecgee: vel subglaber ; capitula 
cymosa vel corymbosa. 
_++ Capitula 8-10 mm. longa. 
= Folia basi acuta vel acuminata. 
9. M. otrvacea, Klatt, J. c., xxxi, pt. 1, 195 (1892). Foliis 
integerrimis. — In woods, Buenos Aires (Costa Rica), January, 1892, 
alt. 200-300 m., H. Pittier, no. 4933. This ry is scarcely dis- 
tinct from M. Sass HBK. 
= Folia basi cordata. 
10. M. corprrotia, Willd., Spec. pl., iii, 1746 (1804). Agua 
Caliente, H. Pittier, no. 137; in underbrush, Surubres near San 
Mateo, P. Biolley, no. 7025; Ujarras, Buenos Aires (Costa Rica), 
AT. Pittier, no. 10,626; and at Navarro, Prov. Cartego, J. D. Smith, 
no. 4855. Widely distributed in the tropics of the New World. 
te at Capitula minora, 5-6 mm. longa. 
11. M.scanpens, Willd., 7. c., 1743 (1804). Foliis variabilibus 
sed semper tenuibus saepissime hastato-cordatis. — Costa Rica: H. 
Pittier, no. 3231; Ad. Tonduz, nos. 7067, 7264, 8589; P. Biolley, 
no. 7425.. The commonest and most widely distributed species of 
a 
3. Notes on tHE Genus Mimosa 1x Mexico anpD CENTRAL 
AMERICA. 
Mimosa argillotropha, spec. nov. Frutex, ramis gracilibus 
obscure puberulis striatis atropurpureis aculeatissimis, aculeis parvis 
seriatim orientibus valde recurvatis peracutis 2 mm. longis; petiolis 
