Erythrina. LEGUMINOS.^. 281 



6. VIGNA. Savi ; Benth. comm. Leg. gen. p. 49. 



Calyx somewhat bilabiate; upper lip entire, Vexillum with 2 callosities 

 near the base of the limb. Keel not spirally twisted. Stigma lateral. Le- 

 gume terete. — Twining herbs. 



^/-l. V. glabra 7 (Savi) : glabrous [pubescent, Ell.'\ ; upper lip of the calyx 

 'obtuse. DC. prodr. 2. p. 401. Donchos luteolus, Jacq. hort. Vind. 1. p. 

 39, t. 90 ?; Parsh, fl. 2. p. 470; Nutt.! gru. 2. p. 112; Ell. sk.2. p. 231. 



Borders of rice-fields, (ieorgia, Pitrsh, Elliull. — (f) Stem running over 

 small shrubs. Leaflets ovate, tapering to a very acute point, very slightly 

 acuminate: petioles 1-2 inches long. Peduncles 2-4 inches long, with 3-5 

 flowers at the summit. Lower tooth of tlie calyx longer than the others. 

 Corolla pale yellow. Keel rather longer than the vexillum. Legume some- 

 what compressed, a little hairy. Ell. — We have only seen the flowers of this 

 plant. They are nearly as large as those of the common Pea. Vexillum 

 very broad. Mr. Nuttall thinks it is distinct from the West Indian species. 



7. DOLICHOS. Linn. ; Benth. comm. Leg. gen. p. 49. 



Calyx with 2 bracteoles at the base, campanulate, more or less bilabiate ; 

 the upper lip 2-cleft or 2-toothed, rarely entire ; lower lip 3-cleft or 3-toothed. 

 Vexillum furnished near the base of the limb with 2-4 callosities: keel more 

 or less falcate. Style not compressed: stigma terminal. Legume compressed. 

 Seeds oval, more or less compressed ; hilum small, oval. — Herbaceous or 

 suffrutescent usually twining plants. Pedicels 1-2 together. 



1. D. multijlorus: perennial; stem twining, pubescent ; leaves orbicular, 

 with a very short acumination, when young velvety-pubescent, in the adult 

 state almost glabrous ; racemes axillary, densely spiked, many-flowered, about 

 as long as the petioles; upper lip of the calyx entire; lateral teeth short and 

 obtuse ; lowest one longest, lanceolate; vexillum obovate, with minute linear 

 callosities ; keel scarcely falcate ; legume broad, straight, much compressed, 

 obtuse, 4-5-seedcd. 



AUuvial banks of the Oconee River, Georgia, Dr. Boykin ! Arkansas, 

 Dr. Leavenworth ! June-July. — Stem 5-10 feet long, retrorsely pubescent 

 Leaflets longer than the petioles, 2-3 (and sometimes 5-6) inches in diameter, 

 often wider than long. Stipules minute, lanceolate. Racemes pedunculate, 

 elongated, 20-30-flowered, many of the flowers abortive : pedicels fasciculate 

 about one lino in length. Vexillum and wings purple and striated internally 

 Keel nearly white. Legume 2-2J inches long, and half an inch wide, nearly 

 glabrous when mature, rounded at the summit, with a short incurved point. 

 Seeds separated by cellular partitions, oval, purplish brown, compressed. 



8.? ERYTHRINA. Linn, s Lam. ill. t. 608; W. ^ Am. prodr. Jnd. Or. 



1. p. 260. 



Calyx tubular or tubular-campanulate, truncate, or bilabiate, or spathaceous. 

 Corolla with a very long lanceolate or obovate vexillum, without callosities at 

 the base, much larger than the very small wings and keel. Stamens straight, 

 nearly as long as the vexillum, diadelphous or more or less monadelphous. 

 Style straight, glabrous. Legume (indehiscent ?) stipitate, elongated, torulose, 

 several-seeded, compressed between the seeds, which are rather distant, 



36 



