474 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
rounded or acuminate at the base, rounded and slightly retuse at the apex, 2 
to 7 cm. long, 1.8 to 2.3 em. broad, glabrous and dark green above, paler be- 
neath and more or less villous, especially along the costa, the veins crowded, 
parallel, running into the marginal nerve, more or less anastomosing through 
intermediate veinlets; stipules caducous, wanting. 
Inflorescence paniculate, axillary or terminal, 15 to 25 em. long, simply 
branched, longer than the leaves, the rachis densely ferruginous-pubescent ; 
peduncles solitary or 2 or 3-fasciculate, sometimes branched, cymose, 3 to 13- 
flowered, 2 to 6 cm. long; bracts and bractlets caducous, not seen; pedicels 
densely ferruginous-pubescent, 2 to 3 mm. long; flowers 12 to 18 mm. long; 
bractlets suborbicular, 2.5 to 8.5 mm. long and broad, ferruginous-pubescent 
without; calyx campanulate, 5 to 6 mm. long, densely ferruginous-pubescent, 
the teeth obtuse or subacute, the carinal tooth longer and narrower; petals 
violet; standard pubescent (more so toward the base) without, the claw short 
(about 1 mm. long), the blade suborbicular or obovate, attenuate-acute at the 
base, slightly emarginate at the apex, with rounded unequal lobes, about 11.5 
mm. long, 11 mm. broad; wings strongly falcate-arcuate, glabrous, the claw 
# mm. long, the blade about 12 mm. long, 3.5 to 4 mm. broad; carinal petals 
Strongly arcuate, glabrous, auriculate on the vexillar side, subacute at the 
apex, the claw 2 to 2.5 mm. long, the blade about 11 mm. long, 3.5 to 4 mm. 
broad; stamens monadelphous, glabrous, the anthers ovate, attenuate to the 
apex; ovary stipitate, densely grayish-villous, 1-ovulate, strongly arcuate, pro- 
vided at the base with a glabrous tubular disk, 1.5 to 2 mm. long; style articu- 
late and sparsely villous at the base, nearly 4.5 mm. long, perpendicular to the 
stipe. 
Legume 6 to 7 em, long, stipitate, the stipe and seminal part ferruginous- 
hairy and more or less setose, the former about 7 mm, long, the latter brown, 
2 cm. long, 1 cm. broad, arcuate toward the apex, the wing cultriform, obtuse, 
sparsely hairy or glabrescent, 4 cm. long 1.7 em, broad; seed brown, reniform, 
about 6 mm. long, 18 mm. broad. 
Type in the Gray Herbarium, collected at Cerro Pedregoso and El Ocote, 
Guerrero, Mexico, altitude 800 meters, in flower, October 28, 1898, by E. 
Langlassé (no. 526). The description of the fruit is from specimens col- 
lected at El Rancho, Department of Jalapa, Guatemala, January 23, 1908, by 
W. A. Kellerman (no, 5599). 
Collected also in the neighborhood of Alajuelita, near San José, Costa Rica, 
in flower, September, 1890, by A. Tonduz (Inst. Fis. Geogr. Costa Rica, no. 3000). 
This species, which is apparently widely spread over the semiarid districts 
of southern Mexico and Central America, escaped the attention of the earlier 
collectors, The Costa Rican specimens were identified by Micheli as M. 
moritzianum Benth. (a very distinct species), an identification which was fol- 
lowed by Capt. John Donnell Smith in his determination of the Guatemalan 
tree. 
10, Machaerium purpurascens Pittier, sp. nov. 
An armed, trailing or scandent shrub, the stems about 5 em. in diameter, 
3 to 4 meters long; branchlets terete, purplish brown, striate, at first brownish- 
hairy, later glabrous. 
Leaves distichous, 17 to 27-foliolate, the rachis 7 to 12 em. long, slender, 
more or less grayish or brown-tomentose; leaflets subcoriaceous, the petiolules 
hairy, not over 1 mm. long, the blades ovate-oblong or obovate, slightly inequi- 
lateral, rounded or (in the terminal leaflet) cuneate at the base, more or less 
obtuse and mucronulate at the apex, 1 to 4 em. long, 0.4 em. broad, glabrous, 
dark green and punctulate above, paler beneath, punctulate, and more or 
