Dicotyls or Exogenous Plants. 71 



Tri-fo'-li-um pro-cutn'-bens L. Low Hop Clover. — Stems spreading or 

 ascending; leaves pinnately 3-foliate, leaflets Jwedge-obovate, notched 

 at the end ; stipules ovate. 



9. Genus KRAUN'-HI-A. [Wistaria) — Flowers large, showy, lilac- 

 purple, in dense racemes ; pods elongated ; leaflets 9-13 ; woody 

 twiners. 



Kraun'-hi-a fru-tes'-cens (L.) Greene. {Wistaria frjitescens Yo\r) — 

 Cultivated; indigenous southward. 



10. Genus RO-BIN'-I-A. — Cah^c slightly 2-lipped ; trees or shrubs, 

 often with prickh- spines for stipules; flowers showy in hanging 

 axillary racemes. Cultivated and sometimes escaped. 



Ro-bln'-i-a pseu-da-ca'-ci-a L. Common Locust. — Branchlets naked; 

 racemes slender, loose, flowers white, fragrant; pod smooth. 



Ro-bin'-i-a vis-co'-sa Vent. Clammy Locust. — Branchlets and leaf- 

 stalks clammy; flowers crowded in oblong racemes, tinged with rose- 

 color. 



Ro-bin'-i-a his'-pi-da L. Bristly Locust. — Shrub 3-8 ft. high; branch- 

 lets and stalks bristly, or sometimes nearh- naked; flowers large and 

 deep rose-color. 



11. Genus VI'-CI-A. — Herbs, mostly climbing by the tendril at the 

 end of the pinnate leaves; stipules half-sagittate; wing of the corolla 

 adhering to the middle of the keel ; not flowering early. 



A. Annual ; flowers 1 or 2 in the axils, or elongated peduncles Z-& flowered. 



Vi'-ci-a sa-ti'-va L. Common Vetch or Tare. — Flowers 1 or 2 in the 

 axils, nearly sessile, large, violet-purple ; leaflets 5-7 pairs, notched or 

 mucronate at apex. Introduced from Europe. 



Vi'-ci-a hir-su'-ta Koch. Hairy Vetch. — Peduncles 3-6-flowered; leaf- 

 lets 6-8 pairs, truncate. Naturalized from Europe. 



A. Perennial, indigenous species ; peduncles i-nianyflo7c'e}-ed. 



Vi'-ci-a crac'-ca L. Vetch.— Downy-pubescent ; leaflets 20-24, oblong- 

 lanceolate, strongly mucronate; spikes denseh' many-flowered, 1-sided; 

 flowers blue, turning purple. 



Vi'-ci-a car-o-li-ni-a'-na Walt. Vetch. — Nearly smooth; leaflets 8-24, 

 oblong, obtuse, scarcely mucronate; peduncles loosely-flowered; 

 flowers whitish, the keel tipped with blue. 



