Vail : Studies ix the Leguminosae 107 



X,eaves trifoliolate. ^ 



Racemes very short-peduncled or sessile. 



Stems prostrate ; leaflets cinereous. 7. D. cinereus. 



Stems generally climbing. 



Leaflets thickish, entire, ovate-rhombic. 8. D. toinentosus. 



Leaflets thin, the margin with a few, broad rovmded undulations. 



D. tomcntosns iindt{latus. 



Racemes peduncled or the uppermost short-peduncled, becoming elongated. 

 Prostrate; leaflets apiculate, 2.5-3.5 cm. long. 9. D. Torreyi, 



Climbing vines. 



Leaflets obovate orbicular, thin, rounded at the broad apex, narrowed 



at the subcordate base. lo, D. Lewtoni. 



Leaflets ovate or ovate-rhombic, thick, velvety-pubescent ; racemes 



con^monly much elongated. II. D. latifolius, 



Erect perennial herbs. 



Leaves unifoliolate, reniform. 12. D. simplicifolius. 



Leaves trifoholatc or some of the basal ones simple. 



Racemes tenninal and axillary, never long-peduncled and elongated. 



Stems simple, I-2 dm. high. 13- D. interiJiedins. 



Stems simple or branched. 



Racemes numerous, short, axillarj' ; leaflets thick, velvety-pubescent, 



acutish or obtuse. 14* ■^- ^rectus. 



Racemes numerous, short, axillary ; leaflets densely velutinous, acute. 



15. D, Dnifumondii. 



Racemes terminal or a few of them axillary, conunonly much elongated. 



16. D. vioUissinius. 



1. Dolicholus minimus (L.) Medik, Vorlcs. Chui\ Phys. 2: 354. 



i;87- 



Dolkh 



Cfli 



1753- 

 1818 



Rhynchosia Caribaca Nutt. Am. Journ. Sci. 5: 298. 1822. 



: Glycine Caribaca Jacq. 178C. 



Glycine Lamarkii H.B.K. Nov. Gen. 6: 424. 1823. 



Glycine punctata DC. Mem. Leg. 365. 1823. 



Glycine littoralis Vahl.; DC. Prodr. 2 : 385. 1825. 



Rhynclwsia minima DC. Prodr. 2 : 385. 1825. 



Rhynchosia Caribaca DC. Prodr. 2 : 386. 1823. 



Rhynchosia ervoidea DC. Prodr, 2 : 386. 1825. 



Phascolns Caribaeus Eat. & Wright, 353. 1840. 



* Rhynchosia Mcxicana Hook. & Arn. Bot. Beech. Voy. 287. 



1 841. 



^ The synonymy given here is only that which can be applied to the American plant. 



