LEGUMINOSAE (PULSE FAMILY) 509 



Flowers 6-9 mm. lon^ ; corolla white or pink ; peduncles 



mostly 3-many times the length of the heads . . . 8. 7*. repens. 



Not stoloniferous %. T. hybridum. 



c. Calyx-teeth deltoid-lanceolate, herbaceous 10. T. carolinianti/m. 



6. Corolla yellow. 



Corolla conspicuously striate-sulcate in age. 



Leaflets all sessile 11. 7". agrarium. 



Terminal leaflet stalked 12. T'^ procumhens. 



Corolla not striate-sulcate 13. 7'. duhium. 



1. T. ARVEN8E L. (Rabbit-foot or Stone C.) Silky branching annual. 

 1-4 dm. high ; leaflets ohlanceolate ; heads becoming very soft-silky and grayish^ 

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



2. T. ixcarnatum L. (Crimson or Italian C.) Suberect soft-puhe scent 

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

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



3. T. pratense L. (RedC.) 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, hristle-poitited ; heads ovoid, sessile or not rarely 

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

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



4. T. MEDIUM L. (Zigzag C.) Stems zigzag, smoothish ; 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. virginicum Small. Low villous perennial, not stoloniferous ; leaflets 

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

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



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

 dovmy ; leaflets ob ovate-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. stolonifenim Muhl. Smooth perennial ; stems imth 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, O. and Ky., w. to la., "Neb.," and Kan. 



8. T. repens L. ("White C.) Smooth perennial; the ^len^ev stems spread- 

 ing and creeping ; leaflets inversely 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. hybridum 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 Fla., Tex., and Kan.; introd. on waste ground near Philadelphia. 



XL T. agrA-Rium L. (Yellow or Hop 0.) Smoothish annual, somewhat 

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

 (palmate) and nearly sessile ; stipules narrow, cohering icith the petiole for more 

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

 {T. aureujn 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. procumbens L, (Low Hop C.) Similar; steins 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-foliola.te) ; stipules ovate, 

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



