286 ORDER XLITI. LEGUMINOS.E. 



1. A. obcorda'tus, (Ell.) Stem nearly glabrous, decumbent, or assur- 

 gent; leaflets 15 — 25, obcordate, small, on petioles. Flower* in ovate 

 spikes. Calyx hairy, with subulate teeth. Legumes oblong, slightly 

 curved, acute. — White. 2£. Southern Geo., Flor. 4 — 8 inches. 



2. A. Canadensis, (L.) Stem erect, canescent, somewhat branched ; 

 leaflets very numerous, 25 — 41, oblong, pubescent underneath. Flowers 

 in compact, elongated, axillary spikes ; peduncles long, bracts subulate. 

 Calyx hairy, teeth subulate, small, corolla much longer than the calyx. 

 Legume terete, glabrous, many-seeded. — Pale yellow. %. June — July. 

 Mountains. 1 — 3 feet. 



3. A. gla'ber, (Mich.) Stem erect, glabrous. Leaflets numerous, 15 — 

 23, small, linear oblong, hairy underneath. Flowers m elongated spikes, 

 few-flowered, 3 — 6 ; peduncles long as the calyx. Legume glabrous, 

 acute at each end, incurved. — Whitish. If.. April. Low country of 

 Georgia. 1 — 2 feet. 



Genus XXXII.— PHA'CA. L. 16—10. 

 (From the Greek phake, a lentil.) 



Calyx 5-cleft, the two upper segments more remote than the 

 others. Keel obtuse. Style smooth ; stigma capitate. Le- 

 gume inflated, 1 -celled. Flowers in axillary racemes. Her- 

 baceous. 



1. P. villo'sa, (Nutt.) A small, hairy plant, procumbent. Leaves 

 unequally pinnate ; leaflets y — 17, oval, oblong, petiolate, rather dis- 

 tant. Flowers on peduncles about as long as the leaves, clustered neai 

 the summit, 8 — 20. Segments of the calyx acute, long, bracts lanceo- 

 late-subulate. Legumes villous, sessile, inflated. Seeds small, few. — 

 Yellow. 0. April — May. On the coast. 4 — 6 inches. 



Tribe VI.— HEDYSA'REiE. 



Legume transversely divided into indehiscent, 1-seeded joints 

 Erect or procumbent herbs or shrubs. 



Genus XXXIII.— ZOR'NIA. Gmel. 16—10. 

 (In honor of Zorn, a Medical Botanist.) 



Calyx bilabiate ; upper lip emarginate, the lower 3-cleft. 

 Petals inserted into the calyx ; vexillum broad-cordate, revo- 

 lute ; keel-petals cohering. Stamens monadelphous, alternately 

 shorter ; anthers alternately oblong and globose. Legume 

 jointed, hispid, 4 — 5 joints. Leaves digitate, petioled, stipu- 

 late. Flowers with 2 bracts. Perennial, herbaceous plants. 



1. Z. tetkapkyl'la, (Mich.) Stem prostrate, branching, diffuse. Leaflets 

 4, lanceolate, glabrous. Flowers in long spikes, 5 — 9-flowered, alternate ; 

 bracts ovate, 5-nerved ; upper segments of the calyx broad, emargi- 

 nate ; all the segments ciliate ; vexillum broad, reniform ; wings 

 broadly ovate, as long as the vexillum ; keel short. Legume 2—4- 

 jointed, joints nearly round. — Yellow. 11. July. Sandy lands. 1 — 

 2 feet long. 



