ROBINSON. — SPECIES OF MIMOSA. 313 
xxx. 3894 (whence foregoing description). — Mexico near Actopan, 
Schiede, acc. to Benth. (Trop. Am.). 
b. Branchlets and peduncles smooth or merely puberulent. 
1. Leaflets ovate or broadly oblong. 
13. M. lactiflua, Detie. Shrub: spines few, scattered, straight : 
leaflets 3 to 5 pairs, obliquely ovate or oblong, somewhat rigid; glauces- 
cent beneath, pinnately veined, glabrous on both surfaces ; margins 
slightly cartilaginous, incurved, ciliate with rigidulous stramineous 
sete: flower 4-merous: legume unknown. — Delile acc. to Benth. 
Trans. Linn. Soc. xxx. 393, & in Mart. Fl. Bras. xv. pt. 2, 311. — 
Regarding the Mexican occurrence of this species Bentham (from whom 
the preceding description is compiled) says, “Delile’s specimens were 
from the Botanical Garden of Montpellier, supposed to be of American, 
perhaps Brazilian origin. In the Berlin Herbarium there is a specimen 
from Mexico which agrees with the detailed description I had made 
(now inserted in the Flora Brasiliensis) except that the leaflets are 
under instead of over $ in. long.” While this species is known to me 
only from description I would refer to it Mr. Nelson’s no. 1845, collected 
9 km. above Dominguillo, Oaxaca, altitude 1375 to 1700 m. 
2. Leaflets rather narrowly oblong. 
14. M. sicyocarpa. Shrub, 1 to 2 m. high, sparingly armed 
with short scattered recurved spines: branches terete: petioles slender, 
glandless, 5 or 6 cm. in length, usually armed below the middle with 
a single short recurved spine: pinne a single pair, 1 dm. in length; 
leaflets 9 to 11 pairs, oblong, oblique at the base, subacute, mucronate, 
dull green and finely soft-pubescent upon both sides, slightly paler 
beneath, 20 to 25 mm. in length, a third as broad: peduncles axillary, 
often geminate, finely pubescent, unarmed: flowers 4-merous: legumes 
lance-oblong, 25 to 30 mm. long, 8 mm. broad, covered upon margin 
“and valves with weak straight spreading stramineous setiform spines. — . 
Collected by H. W. Nelson on roadside between San Sebastiana and the 
summit of the mountain known as the Bufo de Mascota, Jalisco, altitude 
1550 m., 20 March, 1897, no. 4101. The bristling pods crowded in 
dense globular heads recall the fruit of the star-cucumber. 
15. M. ceerulea, Rose. Stems unarmed, nearly or quite glabrous, 
6 to 9 dm. high, straight and terete: leaflets narrowly oblong, 12 mm. 
in length, acutish, mucronate, green on both sides, appressed setose- 
ciliolate, minutely appressed-puberulent or sparingly strigose varying 
to glabrous, reticulate-veiny: peduncles fascicled: flowers purplish, 
