LEGUMINOS^. 25 



petioled ; leaflets i^ — 1\4 in. long, ovate, oblong or lanceolate, acute, 

 striate-veined, sharply denticulate : heads rather large, many-flowered, 

 the raehis commonly produced above the flowers : fl. I3 in. long or more, 

 deep purple : calyx-teeth setaceous-subulate, equalling the tube. — At 

 Summit Station, Boland(v, and northward, in the Sierra. 



i). T. Beckwithii, Brewer, in Wats. Proc. Am. Acad. xi. 128 (1876). 

 Stouter and taller than the last, often a foot high, the head of purple 

 flowers, globose, 1 — l^j in- in diameter, the raehis not produced above 

 the flowers : leaflets broader, often retuse or emarginate. — Near Truckee, 

 on Prosser Creek and in Sardine Valley, Sonne ; also in Sierra Co. 



10. T. Leminoni, Wats. 1. c. 127. Cespitose, petioles elongated, almost 

 equalling the upright or decumbent stems, a span high or less ; herbage 

 appressed-pitberulent : stipules ovate, acuminate, toothed or entire : 

 leaflets mostly .5, obovate or oblong, obtuse, of firm texture, coarsely 

 toothed, % in. long or more : heads rather few-flowered : fl. }^ in. long, 

 deflexed in age ; calyx-teeth villous, 2 lines long, exceeding the short 

 tube. —Sierra Co., Leunnon. Species most related to T. Bolanderi and 

 Kingii notwithstanding its 5-foliolate leaves. 



11. T. Howellii, Wats. Proc. Am. Acad, xxiii. 262 (1888). Stout, erect, 



2 ft. high, glabrous : stipules large, ovate or lanceolate ; petioles short ; 

 leaflets cuneate-oblanceolate, 1 ig— 3 in. long, remotely dentate : peduncles 

 axillary, longer than the leaves : heads large, oblong : calyx-teeth narrow, 

 about equalling the tube : corolla 4—5 lines long, yellowish, or white. — 

 Trinity Mts., Humboldt Co., Chesnu' A Drew. The largest, and one of 

 the most remarkable of western clovers. July, Aug. 



-I— ■)— Flowers nearly or ([ui'e sessile, no' reflexed (except in No. 12); calyx- 



teelli-elongaled, plumose, or at least hairy. 



■M- Perennials. 



12. T. eriocephalum, Nutt. in T. & G. Fl. i. 313 (1838). Erect or 

 decumbent,6— lOin. high,soft-villous : stipules elongated, entire : leaflets 

 oblong, 1 -11 2 in. long, serrulate ; fl. in dense ovate spikes, whitish, at 

 length reflexed : calyx-teeth filiform, very villous, nearly equalling the 

 corolla : pod hairy, 2 — 4-seeded. Mendocino Co. and northward. 



13. T. PRATENSE, Tragus, Stirp. Hist. 586 (1552). Stoutish, ascending, 

 1 ft. high, pubescent : leaflets oval or obovate, often retuse, 1 in. long : 

 heads ovate, 1 in. long, sessile : corolla elongated-tubular, rose-purple.— 

 The common Red Clover of eastern and Old World meadows ; occasion- 

 ally spontaneous with us ; plentiful m a wild state northward, where the 

 Slimmer drought is less prolonged. 



14. T. lou§ripes, Nutt. in T. & G. Fl. i. 314 (1833). Erect or ascending, 



3 -12-in. high, slightly pubescent : leaves and heads on long slender 



