PITTIER—-PLANTS FROM COLOMBIA AND CENTRAL AMERICA. 475 
less villous, the veins distant, anastomosing, inconspicuous; stipules tri- 
angular-acute, 4 to 5 mm, long, at first scarious and villous-tomentose, later 
indurate-spinescent, arcuate, glabrous. 
Inflorescenes paniculate, axillary or terminal, up to 15 cm. long, the rachis 
terete, 3 times ramified; branchlets of the first order brownish-pubescent or 
sometimes densely canescent-tomentose, the others densely villous-tomentose ; 
bracts of the first order more or less indurate and glabrescent, those at the 
base of the peduncles broadly triangular, acute, scarious, densely villous 
without, glabrous inside; peduncles (branchlets of the third order) 5 to 12- 
flowered, sometimes ramified, 1 to 2 cm. long; flowers 6.5 to 7 mm, long, the 
pedicels hairy, up to 2 mm. long, subtended at the base by a minute persistent 
bractlet; bractlets suborbicular, glabrous or sparsely pilosulous, about 1 mm. 
long, 1.5 mm. broad, persistent; calyx persistent, campanulate, 3.5 mm. long, 
purple, glabrous or more or less puberulous on the margin, the teeth subequal, 
subacute, the vexillar ones broader; petals pinkish purple; standard reflexed, 
densely brownish-pubescent without, the claw about 1 mm. long, the blade 
suborbicular (shorter than broad), broadly truncate or subemarginate at the 
base, deeply emarginate at the apex (the lobes broadly rounded), 4 to 5.6 mm. 
long, 7 to 8 mm. broad; wings broadly obovate, glabrous, the claw arcuate, 
about 2 mm. long, the blade oblique, auriculate on the vexillar side at the 
base, broadly obtuse, about 4.5 mm. long, 3.5 mm. broad, the carinal margin 
reflexed; carinal petals falcate, glabrous, the claw as in the wings, the blade 
auriculate on the vexillar side at the base, subacute at the apex, about 4.5 mm. 
long, 2.5 mm. broad ; stamens monadelphous, glabrous, the filaments arcuate ; 
ovary 1-ovulate, stipitate (without basal disk), densely villous-tomentose, 
the style slender, straight, glabrous. 
Fruits yellowish green or purplish, at first ferruginous-pubescent, glabrous 
when fully ripe, short-stipitate, 4.5 to 5 cm. long, the seminal part about 8 
mm. broad, the wing cultriform, rounded-obtuse and apiculate at the apex, 
up to 12 mm, broad, 
Type in the U. S. National Herbarium, no. 676886, collected at Ancén, 
Canal Zone, Panama, in flower, February 14, 1911, by H. Pittier (no. 2749). 
The following additional specimens may be cited : 
Panama: Open slopes of old French cut near Bohio, Canal Zone, im- 
mature flowers, February 12, 1911, Maron 4783. Vicinity of Peno- 
nomé, Province of Coclé, immature fruits, February or March, 1908, 
Williams 112, 418, 414, 415. Vicinity of La Palma, southern Darién, 
flowers, January 26, 1914, Pittier 5495. Panama, flowers, March, 1847, 
Seemann 465. 
This is probably the species collected in Panama by Hayes (no. 328), Sin- 
clair, and Hinds, and identified as M. angustifolium. It belongs, however, to 
the section Oblonga and differs from that species in the general purplish color- 
ation of the branchlets, flowers, and fruits, in the number, size, and shape of 
the leaflets, and in the peculiar shape of the standard and wings. 
11, Machaerium costaricanum Pittier, sp. nov. 
An armed shrub (or a small tree?) ; branchlets subangular, at first pilosulous, 
later glabrous. 
Leaves 41 to 55-foliolate, the rachis 18 to 25 cm. long, slender, densely ferru- 
ginous-hairy ; leaflets membranous, the petiolules hairy, about 1 mm, long, the 
blades narrowly oblong, rounded at the base, rounded or slightly emarginate 
at the apex, 2 to 3.5 cm. long, 5 to 8 mm. broad, more or less villous-tomentose 
on both faces, the veins numerous, parallel, sparsely anastomosing, running 
into the marginal nerve; stipules indurate-spinescent, slender, sharp, about 8 
mm. long. 
