POLYPETALOUS EXOGENOUS PLANTS. 233 



long to linear-lanceolate, obtuse, smooth or slightly pubes- 

 cent; legume 3-5-jointed, the joints triangular. Stem 

 2°-4° high. 



*** stipules subulate^ deciduous ; legume 2-3-jointed, the joints small, oval, or 

 obliquely obovate ; flowers small. 



D. Marilandicum, Boott. Stem erect, smooth, mostly 

 simple ; leaflets ^mall, ovate or roundish, obtuse, smooth, 

 pale beneath, commonly shorter than the petiole ; panicle 

 rough; legume mostly 2-jointed. Stem 2°-3° high. 



D. CILIARE, DC. Very much like D. Marilandicum, 

 but the stem and leaves rough-hairy, and the leaflets longer 

 than the petiole. 



D. SESSILIFOLIUM, Gray and Torrey. Stem erect, rather 

 stout, tomentose-pubescent ; leaves sessile; leaflets linear or 

 oblong, rather coriaceous, obtuse at each end, reticulated, 

 scabrous above, tomentose with soft pubescence beneath ; 

 stipules subulate, somewhat persistent; racemes panicu- 

 late, much elongated ; pedicels very short ; bracts minute ; 

 upper lip of the calyx slightly emarginate ; the lower tooth 

 a little longer than the triangular lateral ones; legumes 

 small, nearly sessile, of 2-3 somewhat semi-orbicular hispid 

 joints. 



D. PUBENS. Stem puberulent, l°-2° high ; leaves oblong- 

 lanceolate, rather rigid, pubescent ; leaflets l'-3' high, long, 

 minutely pubescent; ^^oz^ers purple; legume rather large, 

 the joints oblong, angled on the back. — Gray and Torrey, 



RHYNCHOSIA, DO. 



Calyx 2-lipped, with the upper lip 2-cleft and the lower 

 8-parted, or nearly equally 4-parted ; stamens diadelphous 

 (9 and 1); style smooth, subulate; legume oblong or 

 scymetar- shaped, mostly 1-2-seeded; seeds carunculate. — 

 Erect or twining herbs or shrubs, with 1- or 3-foliolate 



