Vol. 33, pp. 45-54 - July 24, 1920 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NINE NEW PLANTS OF THE GENUS STYLOSANTHES. 



BY S. F. BLAKE. 



Since the publication in 1890 1 of Taubert's excellent mono- 

 graph of the leguminous genus Stylosanthes, in which 22 species 

 were described, only three new species have been added to the 

 genus. In the present paper, based on a study of the material 

 in the U. S. National Herbarium, nine new species are de- 

 scribed, one from Florida, three from Mexico, one from the 

 Bahamas and Cuba, and one each fron Venezuela, Ecuador, 

 Brazil and Paraguay. The arrangement of species and nomen- 

 clature of the parts of the inflorescence follow in essentials 

 Taubert's monograph ("prophyllum" = bractlet; "seta plu- 

 mosa" = axis rudiment). 



Section Styposanthes. 

 Stylosanthes gloiodes, sp. nov. 



Base not seen; stems suffrutescent, branched, 2 dm. long and more, 

 densely short-hispid-pilose with ascending or spreading tuberculate-based 

 hairs and extremely viscid; leaves mostly much shorter than the inter- 

 nodes, 3-foliolate; sheaths of the stipules 6 to 7 mm. long, pubescent and 

 viscid like the stem, the teeth lance-subulate, strongly 1 -nerved, 2.5 to 4 

 mm. long; petioles 2.5 to 4 mm. long, similarly pubescent and viscid, the 

 rachis 1 mm. long; leaflets subsessile, elliptic, 7 to 14 mm. long, 2 to 4 mm. 

 wide, acutish, mucronate, rounded at base, firm, entire, deep dull green, 

 loosely and rather sparsely pilose above, tuberculate-hispidulous-ciliate on 

 margin, beneath rather densely and loosely crisped-pilose, densely hispidu- 

 lous with glandular-tuberculate-based hairs, viscid, the 3 to 5 pairs of veins 

 whitish and prominent beneath, scarcely forming a submarginal nerve; 

 spikes oblong, about 12-flowered, 10 to 14 mm. long, usually aggregated 



1 Verh. Bot. Ver. Brandenb. 32: 1-34. 1890. 



9— Proc. Biol. Soc. Wash., Vol. 33, 1920. (45) 



