LEGUMINOSiE. (PULSE FAMILY.) 91 



* Fruiting calyx erect. 



1. T. pratense, L. (Red Clover.) Hairy; stems erect; leaflets ob- 

 long-ovafe or oval, often emarginate, slightly serrulate ; heads large, ovate ; 

 calyx-teeth setaceous, hairy; flowers purple. — Around dwellings. Introduced, 

 but scarcely naturalized, at least in the low country. — Stems 1°- 2° high. 

 Leaves usually marked with a pale 3-angled spot above. 



2. T. arvense, L. (Rabbit-foot Clover.) Softly pubescent ; stems 

 erect; leaflets linear-oblong, minutely 3-toothed ; heads oblong; calyx-teeth se- 

 taceous, plumose ; corolla white, with a purple spot on the wings. — Old fields, 

 chiefly in the upper districts. Introduced, fjf) — Stems 8' - 12' high. 



* * Fruiting calyx reflexed. 



3. T. reflexum, L. (Buffalo Clover.) Pubescent ; stems ascending ; 

 leaflets roundish or obcordate, tootiied, the uppermost oblong ; heads globose ; 

 calyx-tube very short, the subulate teeth long and hairy ; vexillum broadly ovate, 

 purple; the wings and keel white; legume 3 — 5-seeded. — Waste places and 

 pastures, Florida to North Carolina, and northward. April and May. Q[ and 

 (D — Stems G' - 12' long. Heads large. 



4. T. repens, L. ("White Clover.) Smooth; stems creeping; leaf- 

 lets roundish or obcordate ; heads globose, long-peduncled ; calyx-teeth short ; 

 flowers white ; legume 4-seeded. — Pastures and around dwellings. Introduced. 

 May. 1J. — Stems 6'- 12' long. 



5. T. proeumbens, L. Pubescent; stems slender, erect or procumbent ; 

 leaflets small, thin, obovate or obcordate, toothed, the middle one stalked ; 

 heads small, ovate; flowers yellow; legume 1-seeded. — Waste places ; more 

 common in the upper districts. Introduced. (5) — Stems 6'- 12' long. 



6. T. Carolinianum, Michx. Pubescent ; stems tufted, prostrate ; leaf- 

 lets small, obcordate, slightly toothed ; heads roundish, long-peduncled ; flowers 

 white, tinged with purple ; vexillum acute; legume 4-seeded. — Fields and pas- 

 tures, Florida to North Carolina, and westward. March and April. \ — 

 Stems 6' -10' long; in shady places erect 



6. HOSACKIA, Dougl. 



Calyx 5-cleft. Vexillum as long as the keel and spreading wings. Stamens 

 diadclphous (9 & 1). Legume cylindrical or compressed, smooth, wingless, 

 many-seeded. — Herbs. Leaves trifoliolate or pinnate. Stipules mostly minute 

 and gland-like. Peduncles 1 -several-flowered. 



1 H. Purshjana, Benth. Hairy; stem much branched ; leaves trifolio- 

 late, with oblong leaflets ; peduncle 1-flowered, longer than the leaves ; keel 

 acute ; bracts simple ; legume linear, nearly terete. — North Carolina. — Stem 

 12'- 15' high. Flowers rose-color. 



7. PSORALEA, L. 



Calyx campanulate, 5-cleft, with the lobes acute. Stamens diadclphous or 

 partly monadelphous : half of the anthers often imperfect. Legume often 



