496 COXTRIBUTIOXS FROM THE NATIONAL HERBARIUM. 



4. Eriosenia palmeri S. Wats. Proc. Amer. Acad. 22: 408. 1887. 

 San Luis Potosf to Jalisco and Teplc; type from Tequila, Jalisco. 



Plants low. herbaceous or suffrutescent, copiously hirsute with fulvous or 

 brown hairs ; roots tuberous-thickened. 



Specimens reported from Veracruz as E. crinituin (H. B. K.) Don probably 

 belong to this species. 



Rhyncho.^ia hirsuta Mart. & Gal.* is either this plant or a closely related one. 



5. Eriosema pulchellum (H. B. K.T Don, Hist. Dichl. PI. 2: 348. 1832. 

 Glt/cine pulcheUa H. B. K. Nov. Gen. & Sp. 6: 422. 1823. 



Chihuahua to Veracruz and Oaxaca. Central America; Colombia (type 

 locality). 



Plants suft'rutescent ; leaflets mostly oblong, 2. .5 to 7 cm. long, obtuse. 

 The leaves are sometimes unifoliolate on young plants. 



41. DOLICHOLUS Medic. Vorles. Churpf. Phys. Ges. 2: 354. 1787. 

 Plants herbaceous or frutescent, scandent or prostrate or rarely erect ; leaves 

 usually pinuately 3-foliolate. rarely unifoliolate ; flowers racemose ; fruit bival- 

 vate. 



A few herbaceous species not enumerated here are found in Mexico. 



Plants erect 1. D. pringlei. 



Plants scandent. 



Flowers 1.5 to 2 cm. long or larger. 



Leaflets acute; bracts broadly ovate, acute 2. D. macrocarpus. 



Leaflets long-acuminate ; bracts lanceolate or lance-ovate, acuminate. 



3. D. discolor. 

 Flowers 1 cm. long or shorter. 



Calyx lobes subequal, the upper ones 3 times as long as the tube or longer. 



4. D. longeracemosus. 

 Calyx lobes unequal, the upper ones about as long as the tube. 

 Fruit more or less hispid, not constricted between the seeds. 



Leaflets longer than broad, not reticulate-veined ; fruit long-hispid ; 



stems scarcely at all viscid-pubescent 5. D. nigropunctatus. 



Leaflets about as broad as long, conspicuously reticulate-veined ; fruit 



short-hispid ; stems densely viscid-pilose 6. D. potosinus. 



Fruit velutinous-puberulent, often constricted between the seeds. 

 Fruit 4 to 5 mm. wide, not constricted between the seeds. 



7. D. minimus. 

 Fruit 8 to 12 mm. wide, constricted between the seeds. 



8. D. phaseoloides. 



1. Dolicholus pringlei Rose, Contr. U. S. Nat. Herb. 10: 101. 1906. 

 Rhynchosia pringlei Rose. Contr. U. S. Nat. Herb. 3: 316. 1895. 

 Oaxaca ; type from Las Sedas. 



Erect shrub, 1 to 1.5 meters high ; leaflets strongly reticulate-veined, 2.5 to 5 

 cm. long and nearly as wide, densely pubescent ; flowers large, in long narrow 

 panicle*; fruit hirsute; seeds dark brown. 



2. Dolicholus macrocarpus (Benth.) Rose, Contr. U. S. Nat. Herb. 10: 101. 



1906. 



Rhynchosia macrocarpa Benth. PI. Hartw. 11. 1839. 



Chihuahua and Durango to Hidalgo ; type from Aguascalientes. 



Plants scandent, herbaceous or suffrutescent ; leaflets 3 to 11 cm. long, densely 

 pubescent; flowers large, in long racemes; fruit about 4 cm. long and 1.2 cm. 

 wide, densely pubescent; .seeds dark brown. 



' Bull. Acad. Brux. 10 ': 198. 1843. 



