Pulse Family 213 



-*- Calyx-teeth plumose; flowers subsessile, not reflexed in age. 



5. T. pratense L. Rather stout, erect perennial, 2-3 dm. 

 high, pubescent ; leaflets oval or obovate, often retuse, 2-3 cm. 

 long; corolla elongated-tubular, rose-purple. 



Sparingly cultivated and occasionally appearing as an escape. 



6. T. Macraei albopurpureum (T. & G.) Greene. Much 

 branched, ascending or erect, 1-4 dm. high; stipules ovate to 

 lanceolate ; leaflets cuneate-oblong, obtuse, denticulate above the 

 middle, 12-20 mm. long; heads long-peduncled, ovate; calyx- 

 teeth longer than the tube, slender, plumose, equaling the small 

 white-tipped purple corolla. (T. albopurpureum T. & G.) 



Frequent on the plains and grassy hills. March-April. 



** Heads involucrate. 

 *- Flowers not inflated. 

 ** Involucre flat. 



7. T. Wormskjoldii Lehm. Perennial, spreading under- 

 ground by slender rootstocks; stems decumbent, often 3 dm. 

 long or more ; herbage flaccid, glabrous ; stipules lanceolate-acum- 

 inate, laciniately toothed ; leaflets obovate-oblong, obtuse, pecti- 

 nate-denticulate, 2 cm. long or more; involucre 1-2 cm. broad, 

 laciniate-aristate ; calyx-tube scarious, 10-striate; teeth linear- 

 subulate, much longer than the tube, all entire or 1 or more se- 

 taceously 2-3-parted; standard deeply emarginate, pale purple, 

 the other petals darker. (T. involucratum of Bot. Cal. in part.) 



Frequent in low ground in the valleys. March-July. 



8. T. spinulosum Dougl. Perennial with rather slender de- 

 cumbent or ascending stems, 2 dm. long or more; leaflets nar- 

 rowly oblong, acute at both ends, spinulose denticulate, ending 

 in a stiff spinulose cusp; stipules ovate-acuminate, spinulose- 

 serrate; involucre deeply cleft or divided, smaller than in the 

 last; calyx-teeth narrowly subulate, stiff and pungent, about 

 equaling the corolla. 



Frequent in the meadows of the San Gabriel and San Bernardino Moun- 

 tains. Closely related to the last, and intermediate forms may be found. 



9. T. variegatum Nutt. Annual ; glabrous, decumbent or pros- 

 trate with many slender branches; stipules lanciniately cleft; 

 peduncles slender, longer than the leaves ; leaflets of the lower 

 leaves obcordate, those of the upper obovate-oblong, minutely 



