24. T. 



FUCATCM. 



26. T. 



AMl'LECTEXS. 



25. T. 



DEPAUPERATUM 



Trifolium. LEGUMIXOS-F.. J27 



Corolla becoming conspicuously inflated. 



More or less villous : involucre broad, setaceously many-toothed : 



calyx-teeth filiform, plumose. 23. T. BARBIGEKCM. 



Smooth, stout : Bowers large : involucre broad, deeply lobed or parted ; 



lobes entire : teeth narrowly subulate. 

 Smooth, low and slender : flowers lew, small : calyx-teeth narrowly 

 subulate. 

 Involucre with oblong entire obtuse lobes, equalling the calyx. 

 Involucre nearly wanting, merely a toothed or entire disk. 



§ 1. Heads not involucrate, dense: leaflets 5 to 7, rarely 3, thick: flowers sessile: 

 calyx-teeth nearly equal, filiform, plumose: perennial. 



1. T megacephalum, Xutt. Stout, a span high or less, somewhat villous: 

 stipules large, ovate-oblong, serrate; leaflets euneate-oblong to obovate, obtuse, 

 mucronate, an inch lung or less, toothed : heads mostly terminal, pedunculate, large : 

 flowers spicate, an inch long, purplish: calyx half as long, the teeth very much 

 longer than the tube: pod stipitate, 6-ovuled, smooth. — (Jen. ii. 105; Torr. & 

 Gray, Fl. i. 315. Lupinaster macrocepluilus, Pursh, Fl. ii. 47'J, t. 23. 



Sierra Valley, Sierra Co. (£emmoti) ; Diamond Sits., X. Nevada {Wheeler); northward in the 

 mountains to the British boundary (I/yalV) : rather rare. 



2. T. Andersonii, < hay. Dwarf, cespitose, densely silky- villous, ■ leafy : stip- 

 ules lanceolate, acuminate, entire ; leaflets euneate-oblong, half an inch long, acute. 

 nearly entire: peduncles mostly axillary, shorter than the leaves : flowers half an 

 inch long, purplish, umbellate ; the outer bracts forming a rudimentary involucre : 

 calyx-teeth a little shorter than the petals: pod tomentose, about 5-ovuled, 1—2- 

 seeded. — Proc. Am. Acad. vi. 522. 



Sierra A r alley {Lcmmon) ; Carson Valley, Nevada, Anderson. Crowing in dense tufts or mats, 

 3 or 4 inches high, the stout bases of the stems almost woody. " The roots grow very deep, and 

 so strong are the fibres that an ordinary breaking plough with two yokes of oxen can scarcely tear 

 them up." 



3. T. Lemmoni, Watson. Dwarf, cespitose, alpine, sparingly appressed-pubes- 



cent : stems rather slender, from a thick root: stipules ovate, acuminate, coarsely 

 toothed; leaflets obovate, obtuse, coarsely toothed, half an inch long or less : pedun- 

 cles mostly terminal, equalling the leaves: heads small, the rhachis only two lines 

 long: flowers numerous, spicate, very small (so fir as known): calyx villous, two 

 lines long, exceeding the purplish petals : standard strongly hooded : ovary smooth, 

 2-ovuled. — Proc. Am. Acad. xi. 127. 



Lassen's Peak, Lemmon. The few specimens are imperfect, only a few perhaps undeveloped 

 flowers remaining open the receptacle. 



§ 2. Heads not involucrate, terminal or apparently so, pedunculate: leaflets 3 -.flowers 

 sessile or near/;/ so : bit nnial or pi n nnial. 



M 'ore or less pubescent: calyx-teeth very narroio, longer than the tube, plumose or 

 hairy: stipules lanceolate, acuminate. 



4. T. eriocephalum, Null. Erect, a span high or more, villous with spread- 

 ing hairs, or the stem and leaves rarely glabrous : stipules long, nearly entire ; leaf- 

 lets narrowly oblong or sometimes broader, 1 to \\ inches long, serrulate: flowers 

 in dense ovate spikes, at length ceflexed, 1 to (5 lines long, ochroleucous : calyx- 

 teeth very villous, filiform, lax. nearly equalling the petals: ovary hairy, 2-1- 

 ovuled. — Torr. & Gray, El i- 313. 



Mendocino Co, (Bolander), and frequent in Oregon and Idaho, on moist soils. 



5. T. plumosum, Dougl. Erect or ascending, a fool 1 1 i - 1 1 or more, stout, some- 

 what appressed-villous I 3tipuleS long, entire or toothed ; leaflets narrowly obloi 

 linear, 2 to I inches long, serrulate: flowers in dense oblong or ovale spike-, not 



