FAB ACE AE. 195 



4. T. repens L. Perennial, diffuse, creeping, with erect long- 

 stalked leaves and heads; leaflets obcordate, denticulate; calyx-teeth 

 unequal, lanceolate-subulate, shorter than the tube; corolla white; 

 pods usually 4-seeded. 



The white clover of lawns, occasionally appearing as an escape. 



5. T. albopurpureum T, & G. 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. 



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



6. T. wormskjoldii Lehm. Perennial, spreading underground 

 by slender rootstocks; stems decumbent, often 3 dm. long or more; 

 herbage flaccid, glabrous; stipules lanceolate-acuminate, laciniately 

 toothed; leaflets obovate-oblong, obtuse, pectinate-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 setaceously 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, also in mountain meadows. 



7. T. tiidentatum Lindl. Annual; erect, 2-4 dm. high, glabrous; 

 stipules setaceously laciniate; leaflets linear or lanceolate, sharply 

 serrate, 2-6 cm. long; head 2-3 cm. broad; involucre laciniate, much 

 shorter than the flowers; flowers about 1 cm. long, bright purple 

 with darker center; tip of standard sometimes whitish; calyx-tube 

 10-nerved; the teeth rigid, broad at base, abruptly narrowed to a 

 subulate spinulose-tipped apex which is usually subtended by a 

 short stout tooth on each side. 



Frequent on the plains and grassy hillsides. Very variable as 

 to foliage. March-April. 



8. T. variegattim Nutt. Annual; glabrous, decumbent or pros- 

 trate with many slender branches; [stipules laciniately cleft; pe- 

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

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

 serrate; involucre laciniate, shorter than the 3-15-flow^ered heads; 

 calyx-tube 15-nerved; teeth broadly subulate, tapering to a setaceous 

 point, longer than the tube; corolla exceeding the calyx, purple and 

 whitish-tipped. 



Frequent in grassy openings in the San Gabriel and San Ber- 

 nardino Mountains, confined mostly to the pine belt. 



9. T. obtusiflonim Hook. Annual; stems stout, erect, flexuose, 

 purple, with ascending branches; leaves dull green, soft pubescent 

 throughout and very clammy, acidulous; stipules spreading or 

 reflexed; leaflets 2-3 cm. long, linear-lanceolate, pectinately setulose; 

 heads 2-3 cm. broad on long peduncles; calyx-tube with 10 prominent 

 and as many lesser nerves; corolla whitish with a dark purple center. 



Occasional on moist shady slopes and along streams in all our 

 mountains, confined mostly to the chaparral belt. 



