STANDLEY—TROPICAL AMERICAN PHANEROGAMS. 189 
Type in the U. S. National Herbarium, no. 763864, collected along the Rfo 
de Pilas, Distrito de Pochutla, Oaxaca, Mexico, altitude 300 meters, April 27, 
1917, by C. Conzatti (no, 3191). 
Not closely related to any species of Calliandra previously reported from 
Mexico. In the absence of fruit it is impossible to be certain that the plant 
is not a Pithecollobium, but if so it can not be referred to any of the described 
species. 
Leucaena cuspidata Standl., sp. nov. 
Branches slender, subterete, reddish brown, glabrous; stipules 2 to 3 mm. 
long, ovate or deltoid-ovate, cuspidate; petioles 1.5 to 2.5 cm. long, with a de- 
pressed circular gland at the apex, the rachis 3 to 8 cm. long, glabrous, the 
pinnae 5 to 9 pairs, 4 to 7 cm. long, their rachises ‘glabrous or at first sparsely 
pilose ; leaflets 15 to 40 pairs, sessile, ovate-oblong, most of them about 4.5 mm. 
long and 2.2 mm. wide, obliquely rounded or truncate at the base, rounded or 
obtuse and cuspidate at the apex, coriaceous, glabrous, dark green on the upper 
surface, the venation plane or prominulous, much paler beneath, the venation 
prominent, the margin plane; peduncles axillary, 2 to 3.5 cm. long, glabrous, 
involucellate above the middle, the flowers sessile in a globose head 7 to 8 
mm. in diameter; calyx 2 mm. long, shallowly dentate, glabrous or puberu- 
lent above; corolla 3 mm. long, glabrous; anthers short-exserted, glabrous; im- 
mature fruit sessile or nearly so, attenuate to the base, glabrous. 
Type in the U. S. National Herbarium, no. 463766, collected at Minas de San 
Rafael, San Luis Potosi, Mexico, May, 1911, by C. A. Purpus (no, 5183). 
The coriaceous, cuspidate leaflets, with prominent venation, are quite unlike 
those of any of the described species. 
Leucaena plurijuga Standl., sp. nov. 
Branches brown, terete, minutely puberulent when young, furnished with 
numerous small pale lenticels; stipules deciduous; petioles 3.5 to 5 em. long, 
minutely puberulent or glabrate, furnished near the base with a large depressed 
oblong gland, the rachis 3 to 9.5 cm, long, the pinnae 3 to 5 pairs, 5 to 10 cm. 
long, leaflets 5 to 9 pairs short-petiolulate, oblong or elliptic-oblong, sometimes 
oblong-obovate, usually subfaleate and asymmetric, 1.4 to 5.2 cm. long, 0.7 to 
1.5 em. wide, rounded and more or less oblique at the base, rounded or very 
obtuse at the apex and apiculate, chartaceous, green above, minutely appressed- 
pilose when young, the venation prominulous, paler beneath, sparsely and 
minutely pilose when young but soon glabrate, the venation prominent-reticu- 
late, the margin plane; peduncles axillary, 3 to 3.5 em. long in fruit; fruit 
oblong-linear, about 24 em. long and 4.3 cm. wide, acute at the base, acuminate 
at the apex, glabrous, the valves thin, brown, the stipe about 2 cm. long; seeds 
about 1 cm. in greatest diameter, flat, brown, smooth, sublustrous. 
Type in the U. S. National Herbarium, no. 246386, collected at Monte Leon, 
Michoacin, Mexico, November 12, 1892, by C. G. Pringle (no, 5352). 
Also collected near Querétaro, August, 1906, by J. N. and J. S. Rose (no. 
11173). A sterile specimen collected at Celaya, Guanajuato, in 1897, by J. N. 
Rose (no. 3078), is probably of this species. 
Related to Leucaena macrophylla Benth. and L. macrocarpa Rose, both of 
which differ in their less numerous pinnae and leaflets. 
Pithecollobium leiocalyx Standl., sp. nov. 
Younger branches brownish, puberulent at first, with numerous pale lenticels, 
furnished with few short stout straight ascending spines; petioles slender, 1.2 
to 1.7 em. long, with a small crateriform gland near the base, the rachis 6 to 
