108 Vail : Studies in the Leguminosae 



In pine woods, South Carolina to l^lorida, Texas and south- 

 ward to Brazil. 



A common plant in tropical regions. Very variable. An ex- 

 ceedingly small-leaved and flowered form occurs on the Florida 

 Keys, 



Type in the Linncan Herbarium. 



. Dolicholus parvifolius (DC.) 



RJiy)ichosia parvifolia DC. Mem. Leg. 367. 1823 

 Florida ; West Indies. Apparently not common. 



3. Dolicholus Texensis (Torr. & Gr.) 



Rhj'uchosia Texana Torr. & Gray, Fl. N. Am. i : 387. 1838. 



In dry soil, Texas to Arizona and North Mexico. Also in 

 South Brazil and Argentina. 



Type in the Herbarium of Columbia University. 



This species lias been reduced to Dolichohis Senna (Gillies) 

 Kuntze {Rhynchosia Senna Gill. H. & A. Bot Misc. 3: 199. 

 1 844). I have kept them apart here as the latter species is not 

 very well known and will probably need further study to determine 

 its rightful position.* There are two or even three distinct forms, 

 of which very luxuriant ones with elongated stems and lanceolate- 

 oblong or even linear upper leaves are DoUcliohis Texensis var. 

 angustif alius {Rhynchosia Texana var. angiistifoIia\ Engelm. PI 

 Wright. I : 44. 1852). 



In Contribution a la Flore du Paraguay, by AL ]Michcli (Mem. 

 Soc. Phys. Geneva, 28: 1883). Rliynehosia Tr.n?//^? is maintained 

 as distinct from R. Senna and a new species is described as R. 

 diversifoUa which apparently is very closely related to the Doli- 

 cholus Texensis var. angustifolius of North America. 



4. Dolicholus Swartzii 



Rhynchosia CaribaeaQ\\2e^m. 104, i860. Not Glycine Caribaea 

 Jacquin. 1786. 



A slender, somewhat twining perennial or wood}' vine. Stems 



I am much indebted to Mr. J. Henry "Burkill for valuable notes on some South 

 American material of this species in the Herbarium of Kew Gardens. 

 \DoIichohiS angtistifolius Kuntze, Rev. Gen. PL 3 : 60. 1S98. 



