CLASS XVII. ORDER IV. 295 



nate ; leafets large, smooth, ovate, acuminate. Stipules of the 

 leaves ovate, with a very long point ; those of the leafets subu- 

 late. Flowers large, purple, in racemes terminating the stem 

 and branches. Loments larger than in any of the other species, 

 long, pendulous, composed of about half a dozen diamond-shaped 

 joints. Both the loments and peduncles are rendered adhesive 

 by a covering of minute hooks. — Woods, Oak island, Chelsea. — 

 July. — Perennial. 



317. GLYCINE. 

 § Subgenus Apios. Germs with a cylindrical sheath at base. 

 Glycine monoica. L. Pea Vine. 



Leaves ternate, naked; stems hairy; fertile flowers 

 without petals. L. 

 Syn. Amphicarpa monoica. Nutt. 



A very delicate wood vine, twining upon the bushes, and flow- 

 ering in July and August. Stems slender, covered with minute 

 hairs pointing backward. Leaves in threes, ovate, acute, smooth, 

 and very thin, Flowers in small, axillary, pendulous racemes, 

 with the calyx and corolla nearly white. Legumes short, flat- 

 tish, pointed. — Annual. 



Glycine apios. L, Tuberous Glycine. Ground Nut. 



Leaves pinnate, with seven ovate-lanceolate leaf- 

 ets ; racemes shorter than the leaves ; stem herba- 

 ceous, twining. Willi. 

 Syn. Apios tuberosa. Pursh. 



Not unfrequent in moist woods and thickets. Root tuberous, 

 consisting of fleshy oval knobs, tapering at the ends, arranged at 

 certain distances, like beads, on a principal running root. Stems 

 round, twining. Leaves pinnate, consisting of five or seven 

 ovate, acuminate, smooth leafets. Flowers in axillary racemes, 

 blackish purple, crowded, and not inelegant in their appearance. 

 — July, August. — Perennial. 



31S. ROBINIA. 

 RoBiNiA pseudacacia. L. Locust Tree. 



Leaves pinnate with one odd leafet ; stipules prick- 



