306 LEGUMINOS^. 



teeth longer than the tube, densely plumose-hairy, nearly equaling 

 the small purplish corolla; pod 1-seeded. 



Sail Prancisco; Pacific Grove, H. P. Chandler; also in Chile, 

 whence perhaps introduced. Nearly related to T. albopurpureum. 



2. T. amoenum Greene. Stout, simple- and 1-headed, or once or 

 twice forked above and bearing 2 to several terminal or subterminal 

 heads; herbage soft-pubescent; leaflets broadly obovate, obtuse or 

 retuse at apex and often cuneate at base, less than 1 in. long; stipules 

 ovate, acuminate, the uppermost broader, some unequally notched at 

 apex and with a long setaceous acumination borne in the notch; 

 heads globose, exceeding 1 in. in breadth; calyx-teeth shorter than 

 the purple and white corolla, densely clothed with dull brownish 

 hairs. 



Solano Co. plains between Suisun and Elmira. May-June. 



3. T. dichotomum H. & A. Stems dichotomously branching or 

 the branches mostly from the base, 10 to 16 in. high, the internodes 

 very long; herbage almost glabrous or appressed-pubescent, the leaves 

 more pubescent than the stems; leaflets elliptic- or cuneate-obovate, 

 denticulate towards the apex, 3 to 8 lines long, on petioles 2 

 in. long; stipules ovate, with a short subulate point; peduncles 

 elongated, 7 in. long or less; inflorescence a short cylindrical spike, 

 turbinate at base, 8 to 10 lines long or more; flowers showy, purple 

 and white, 5 lines long; calyx-teeth silky, long and slender, nearly 

 or quite as long as the corolla; pod 1-seeded. 



Coast Eanges, rare in typical form but more frequent on the higher 

 than on the lower hills: Ukiah; Calistoga; Conn Valley near St. 

 Helena; upper Vaca Valley. Apr. Passes into the next species. 



Var. turbinatum. Erect, commonly simple, 4 to 6 in. high; heads 

 narrowly or broadly turbinate, about J in. high. — Hillsides at Eoss 

 Valley. 



4. T. albopurpureum T. & G. Ascending or erect, 4 to 14 in. 

 high; leaflets oblong-obovate, less frequently broadly obovate, dentic- 

 ulate towards the apex, obtuse or emarginate, 6 to 10 lines long; 

 heads ovate-conical, 3 to 8 lines high, solitary at the ends of very 

 long slender peduncles; calyx-teetli slender, delicately plumose, 

 equaling or exceeding the white-tipped purple corolla, which is far 

 less showy than in the last. — (T. ^Ia<!ra3i H. & A. var. albopur- 

 pureum Greene.) 



Everywhere common in the Coast Range region, especially on the 

 lower hills. Variable. 



5. T. columbinum Greene. One ft. high, sparingly branched; 

 leaflets cuneate-oblong, 1 in. long or less; heads ovate with a broad 

 and often truncate base, 1 in. high, dove-color; calyx-tube 1 line long, 

 the filiform segments 5 lines long, silky-plumose throughout, some- 

 times partly concealing the small purple corolla; pod striate, villous 

 at apex. 



Rare in the typical form: low hills of northwestern Solano Co. 

 Apr. -May. Appearance sug;gestive of the Rabbit's Foot Clover, T. 

 agrarium L., of the eastern tlnited States. 



