LBGUMINOSAB (PULSE FAMILY) 509 



Flowers 6-9 mm, long ; corolla white or pink ; peduncles 



mostly 3-many times the length of the heads . . , S. T. repens. 



Not stoloniterous 9. T. hyhridum. 



0. Calyx-teeth deltoid-lanceolate, herbaceous 10. 7". caroUni({nunt, 



6. Corolla yellow. 



Corolla conspicuously strlate-sulcate in age. 



Leaflets all sessile 11. y. agrarium. 



Terminal leaflet stalked 12. T. procumhens. 



Corolla not strlate-sulcate • ... 18. T.dubium. 



U 1. T. AEVENSB L. (Rabbit-poot Or Stone C.) Silky branching annual, 

 1-4 dm. high ; leaflets oblanceolate ; heads becoming very snft-silJcy and grayish, 

 ovoid-cylindrical. — Dry sandy or gravelly soil, roadsides, etc. (Nat. from Eu.) 



2. T. incarnXtum L. (Crimson or Italian C.) Suberect soft-pubescent 

 annual, 3-5 dm. high ; heads cylindrical, often 6 cm. long ; leaflets obovate. — 

 Often cultivated, and sparingly escaping. (Introd. from Eu.) 



3. T. PRATENsii L. (Red C.) Perennial ; stems ascending, somewhat hairy ; 

 leaflets oval or obovate, often notched at the end and marked on the upper side 

 with a pale spot ; stipules broad, bristle-pointed ; heads ovoid, sessile or not rarely 

 pedunculate; corolla niageuta to whitish ; calyx soft-hairy. — Fields and mead- 

 ows ; extensively cultivated. (Introd. from Eu.) 



4. T. siiDiuM L. (Zigzag C.) Stems zigzag, smoothlsh ; leaflets oblong, 

 entire, and spotless; heads mostly stalked; flowers deeper purple; calyx-tube 

 nearly or quite glabrous ; teeth slightly rigid, scarcely ciliate. — Dry hills, e. 

 Mass. ; several reports from other Am. localities 'appear to refer to the preceding 

 species. (Nat. from Eu.) 



5. T. virglnicum Small. Low villous perennial, not stoloniferous ; leaflets 

 narrowly oblong, denticulate; flowers nearly white, in large heads; short calyx 

 canescent-pubescent. — Rocky slopes, Kate's Mt., W. Va. 



6. T. reflfixum L. (Buffalo C.) Annual or biennial; stems ascending, 

 downy; leaflets obovate-oblong, finely toothed; stipules thin, ovate ; standard 

 rose-red; wings and keel whitish; calyx-teeth hairy; pods 3-5-seeded. — 

 Borders of fields and woods, w. N. Y. and Ont. to la., "Neb.," Kan,, and 

 southw. 



7. T. stoloniferum Muhl. Smooth perennial; stems with long runners from 

 the base ; leaflets broadly obovate or obcordate, minutely toothed ; heads loose ; 

 flowers white, tinged with purple ; pods 2-seeded. — Open woodlands and prai- 

 ries, 0. and Ky., w. to la., " Neb.," and Kan. 



8. T. rtpens L. (White C.) Smooth perennial ; the slender sfems spreati- 

 ing and creeping ; leaflets iniiersely heart-shaped or merely notched, obscurely 

 toothed ; stipules scale-like, narrow ; petioles and especially the peduncles very 

 long ; heads small and loose ; calyx much shorter than the white corolla ; pods 

 about 4-seeded. — Fields and copses, everywhere ; indigenous only in the north- 

 ern part of our range, if at all. (Eurasia.) 



9. T. HtBEiDDM L. (Alsike C. ) Resembling T. repens, but the stems 

 erect or ascending, not rooting at the nodes; leaflets ovate, rounded at apex; 

 flowers rose-tinted. — Generally common. (Introd. from Eu.) 



10. T. carolinianum Michx. Somewhat pubescent small perennial, pro- 

 cumbent, in tufts; leaflets wedge-obovate and slightly notched ; stipules ovate, 

 foliaceous ; heads small, on slender peduncles ; calyx-teeth lanceolate, nearly 

 equaling the purplish corolla; standard pointed ; pods 4-seeded. — Rocky places, 

 Va. to ria., Tex., and Kan.; introd. on waste ground near Philadelphia. 



V' 11. T. agrXrium L. (Yellow or Hop C.) Smoothish annual, somewhat 

 upright, 1-3 dm. high; leaflets obovate-oblong, all three from the same point 

 (palmate) and nearly sessile ; stipules narrow. Cohering with the petiole for more 

 than half its length ; corolla- yellow, persistent, becoming dry and brown in age. 

 {T. aureum at least of Am. auth.) — Sandy fields and roadsides ; N. S. to Va. ; 

 also in w. N. Y., Ont., and la. (Nat. from Eu.) 



12. T. prociJmbens L. (Low Hop C.) Similar; stems spreading or ascend- 

 ing, pubescent, 1-1.5 dm. high; leaflets wedge-obovate, notched at the end, the 

 lateral at a small distance from the other (pinnately 3-foliolate) ; stipules ovate, 

 short. — Sandy fields and roadsides, common. (Nat. from Eu.) 



