50 Proceedings of the Biological Society of Washington. 



to 2.5 mm. long, 2 to 2.2 mm. wide, compressed, rather densely appressed- 

 pilosulous, with about 3 prominent veins on each side, the upper joint 

 similar, 2.5 to 3 mm. long, 2 mm. wide, rather densely to very sparsely 

 pilosulous, reticulate and with 1 or 2 prominent nerves on each side, the 

 stoutish hooked pilosulous beak 0.8 to 1.5 mm. long. 



Type in the U. S. National Herbarium, no. 602363, collected at Valera, 

 State of Trujillo, Venezuela, altitude 550 meters, October 31, 1910, by 

 Alfredo Jahn (no. 169). 



Other specimens examined: 



Venezuela: Paramo de los Apartaderos, Sierro de Nevada de Merida, 

 State of Merida, altitude 3300 meters, December, 1910, Jahn 108. In 

 savannas, Lower Cotiza, near Caracas, altitude 800 to 1200 meters, 

 August 26, 1917, Pittier 7319. 



This species seems to be most nearly related to Stylosanthes scabra Vog., 

 known to me only from description, from which it differs in the longer 

 teeth of the petiole-sheaths, the merely hispidulous leaflets, the much 

 shorter heads, and the two fruiting joints and shorter beak of the pod. 



Stylosanthes subsericea, sp. nov. 



Frutescent and branched below, erectish, about 3 dm. high, sparsely 

 branched above; stem gray-barked, appressed-pilose ; branches densely 

 subsericeous-pilose with appres-ed hairs; leaves mostly shorter than the 

 internodes, 3-foliolate: sheaths of the stipules 5 to 9 mm. long, densely 

 subsericeous-pilose with appressed hairs, the teeth subulate, 4 to 6 mm. 

 long, mucronate-aristate ; petioles 3 to 6 mm. long, densely silky-pilose, 

 the rachis 1.5 mm. long; leaflets elliptic to obovate-elliptic, 10 to 19 mm. 

 long, 3 to 6.5 mm. wide, strongly mucronate at the usually acute apex, 

 rounded at base, entire, loosely appressed-pilose above, subglabrate, be- 

 neath and on margin loosely ascending-pilose, along costa sparsely hispid- 

 pilose with spreading hairs, the lateral veins 4 or 5 pairs, prominent be- 

 neath, forming a submarginal nerve; spikes about 4-flowered; outer bracts 

 trifoliolate, similar to the leaves, the inner unifoliolate ; secondary bract 1, 

 lance-ovate, acuminate, entire, pilose-ciliate nearly to base, 6 to 7.5 mm. 

 long; axis rudiment subulate, pilose except toward apex, in flower about 2 

 mm. long; bractlet 1, similar to the secondary bract, 3.5 mm. long; calyx 

 11.5 mm. long (including the 6.5 mm. long stipe-like base), the upper lip 

 densely long-pilose-ciliate and somewhat pilose dorsally, with two rounded 

 lobes, the lateral lobes shorter than the upper lip, ciliate and sparsely 

 pilose dorsally, rounded, the lowest lobe the longest, acute, pilose-ciliate 

 and dorsally pilose; banner suborbicular-obovate, 6.5 mm. long, 5.5 mm. 

 wide, not clawed; lateral petals obovate, auriculate at base of blade and 

 shortly appendaged within; keel petals similar; fruit unknown. 



Type in the U. S. National Herbarium, no. 567473, collected on the 

 Cerro de Picacho, Oaxaca, Mexico, July, 1914, by C. A. Purpus (no. 

 7152). 



