430 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Type in the U. 8S. National Herbarium, no. 530770, collected near Cérdoba, 
in the Dagua Valley, Pacific Coastal Zone, State of Cauca, Colombia, altitude 
30 to 100 meters, December, 1905, by H. Pittier (no. 583). 
Closely related to the type of the genus, B, irrigua, but differing in the form 
of the fruit, which is not ridged on the angles and depressed on the sides, in 
the short involucral bracts, and in the more ample, differently arranged inflores- 
cence. Nees does not speak of a purplish coloration of the lower surface of the 
leaves of his plant, although he does state that the petioles are reddish. Prob- 
ably the coloration of the leaf surfaces is distinctive in this Colombian species. 
EXPLANATION OF PLATH 24,—Type specimen. ‘'T'wo-fifths natural size, 
NEW LEGUMINOUS PLANTS OF SEVERAL GENERA. 
The two species of Phaseolus of the section Leptospron described 
below have been confused with P. speciosus H. B. K. That plant 
was described from specimens collected along the Orinoco River, and 
it is doubtful whether it occurs in Central America. It differs from 
both the Guatemalan species in having the lower calyx lobes only 
shghtly longer than the upper, as well as in other minor characters. 
The remaining species are of the genera Chamaecrista, Calliandra, 
Mimosa, Erythrina, and Dolicholus. All are from Guatemala and 
Costa Rica, except a new species of Dolicholus collected by Mr. 
Pittier in Colombia. 
Phaseolus spectabilis Standley, sp. nov. PLATE 25. 
Stems twining, slender, densely pilose with rather short hairs; stipules ob- 
long-ovate, 3 to 4 mm. long, persistent, obtuse or acute, finely parallel-nerved, 
pilose, not produced at the base; petioles 2 to 9 cm. long, pilose; stipelle oblong 
to rounded-ovate, obtuse, 2 mm. long; petiolules 3 mm. long or less; leaflets 
ovate to oblong or rhombic-lanceolate, 5 to 11 cm. long, 2 to 6 cm. wide, the 
lateral ones asymmetrical, the terminal one larger than the others, all rounded 
at the base, acute or abruptly short-acuminate, thick and firm, lustrous on the 
upper surface and scaberulous, beneath sericeous but not densely so, prominently 
veined ; racemes 8 to 17 cm. long, nodose, pilose; bracts deciduous, ovate, acute 
to abruptly acuminate, 5 to 7 mm. long; pedicels 4 mm. long or less; calyx 15 
to 20 mm. long, pilose, the tube broadly campanulate, 5 mm. long, the upper 
lip very broad, shallowly emarginate, the lower lip 3-lobed, the lobes twice as 
long as the tube or more, lanceolate or ovate, overlapping at the base, 6 mm. 
wide or less, attenuate to the apex; banner 3 ecm. long, broadly obcordate, 
sessile, glabrous; wing petals and keel of about the same length, the latter 
several times spirally coiled; style strongly bearded; legumes about 14 em. 
long and 8 mm. broad, straight, the valves glabrous, with thickened carinate 
margins. 
Type in the U. S. National Herbarium, no. 472942, collected in the vicinity of 
Secanquim, Department of Alta Verapaz, Guatemala, altitude 550 meters, May 
7, 1905, by H. Pittier (no. 281). 
ADDITIONAL SPECIMENS EXAMINED 
GUATEMALA: Near the Finca Sepacuité, Alta Verapaz, Cook 15. Vicinity 
of Secanquim, Alta Verapaz, alt. 550 meters, Maron & Hay 3145, 3146. 
Cubilquitz, Alta Verapaz, alt. 350 meters, von Tiirckheim (J. D. Smith, 
no. 7856). 
EXPLANATION OF PLATH 25.—Leaf, fruit, and flowers of Phaseolus spectabilis, from the 
Finca Sepacuité, Alta Verapaz, Guatemala, Photographed by O. F. Cook. Natural size. 
