ROBINSON. — SPECIES OF MIMOSA. 329 
Var. glabrata, Benru. Stems, &c., merely puberulent: leaflets 
somewhat larger, green and glabrous, mucronate as in the typical form. 
— Benth, 1. c. MM. malacophylla, var. glabra, Gray in Torr. Bot. Mex. 
Bound. 61 (name only).—On the lower Rio Grande, Schott, Miss 
Croft, and earlier at San Fernando, Tamaulipas, Berlandier, nos. 815, 
235. 
60. M. polyancistra, Benrn. Climbing (?) glabrous shrub: 
spines small, numerous, recurved: pinne 3 to 7 pairs; leaflets 6 to 8 
pairs, oblique, obovate-oblong, mucronate. — Trans. Linn. Soc. xxx. 422. 
—“ New Spain,” Pavon. Description compiled. 
++ ++ Tawny-tomentose: leaflets oblong: spines on bose upper part of the stem 
nd peduncles not conspicu 
’ 61. M. Ervendbergii, Gray. Pinne about 5 pairs; petiole and 
primary rhachis 1 dm. long, armed (as in related species) by numerous 
short recurved spines; leaflets about 12 pairs, 7 to 10 mm. long, 3 mm. 
broad, acutish at the apex, oblique at the base, discolorous, sordid-tomen- 
tose beneath: heads numerous, paniculate; peduncles 2 cm. long, un- 
armed: fruit unknown. — Proc. Am. Acad. v. 178, in part. ; 
costaricensis, Benth. Trans. Linn. Soc. xxx. 423, ex char.— Warten- 
berg near Tantoyuca, Huasteca, Mexico, Ervendberg, no. 2 (herb. Gray) 
in part. This species was founded upon mixed material and it is now 
clear that the specimen to which Dr. Gray referred when he mentioned 
the young leaves is M. invisa, H. & B. Bentham seems never to have 
understood Dr. Gray’s species, referring to it Schrankia elata, Mart. & 
Gal. which from its armed peduncles cannot be the plant here retained 
as M. Ervendbergii, nor from its arborescent habit is likely to have been 
the other component of Dr. Gray’s type. Furthermore Bentham also 
described JZ. costaricensis, which in all characters mentioned corresponds 
accurately to M. Ervendbergii, as here interpreted. If, as is surmised, M. 
costaricensis proves identical, the range of the species may be extended 
to Costa Rica, where coll. by Qersted, and Guatemala, Salvin, acc. to 
emsl, 
“+ ++ ++ Loosely pubescent: leaflets linear to linear-oblong: upper part of the 
stem and often eh eee covered with very numerous reflexed stramineous spines, 
« 62. M. invisa, Marr. Petioles rather long, copiously armed ; 
pinne 4 to 8 pairs; leaflets 12 to 25 pairs, 3 to 4 mm. long, 1 mm. 
broad : heads in simple elongated terminal raceme; peduncles very short, 
villous and often armed; heads rose-purple. — Herb. Fl. Bras. 121; 
Benth. Trans. Linn. Soc. xxx. 436. M. diplotricha, Wright in Sauv. or 
Cub. 34, ace. to Benth. M. Ervendbergii, Gray, |. c. in se Schr 
