472 FABACEAE 



1. T. macrocephalum (Pursh) Poir. Perennial; stem 1-2 dm. high, stout, 

 somewhat villous; leaflets 5-7, villous on both sides, or soon glabrate above, 

 cuneate or obovate, strongly veined, 1-2 cm. long; head short-peduncled; calyx 

 villous, lobes subulate, plumose, about 1 cm. long; corolla purplish, about 2 cm. 

 long; pod stipitate. T. megacephalum Nutt. Wet meadows: Wash. Ida. 

 Calif. Son. Ap-My. 



2. T. plumosum Dougl. Perennial; stem erect, 3-8 dm. high, densely 

 pubescent with short ascending hairs; leaflets linear to oblanceolate, 3-5 cm. 

 long, acute, finely strigose; head elongate, 4-5 cm. long, 2 cm. thick; calyx-tube 

 4 mm. long, densely villous; teeth setaceous, 8 mm. long, plumose; corolla white 

 or pink, about 15 mm. long. Meadows: Ida. Ore. Submont. Mont. Jl. 



3. T. pratense L. Stem erect or decumbent, 2-6 dm. high, more or less 

 pubescent; leaflets oval or obovate, 2-3 cm. long, rounded or retuse at the apex, 

 often with a purplish spot in the middle; heads globose or nearly so, subsessile; 

 calyx- tube about 3 mm. long, sparingly hairy; teeth subulate, 3 mm. long; 

 corolla about 1.5 cm. long. Meadows, roadsides, and fields: Newf. Fla. 

 Calif. B.C.; Wind.; cult, and nat.; native of Eu. My-S. 



4. T. eriocephalum Nutt. Stem erect or decumbent, 2-4 dm. high; 

 leaflets oblong, acute, more or less villous, 2-3.5 cm. long; flowers reflexed in 

 age; calyx villous; tube 2 mm. long; teeth setaceous, 6-9 mm. long, plumose; cor- 

 olla ochroleucous, about 12 mm. long. Wet prairies: Wash. Ida. Calif. 

 Submont. My-Jl. 



6. T. villiferum House. Stem slender, erect, 2.5-3.5 .dm. high; leaflets 

 oblong-oblanceolate, 2.5-4 cm. long, obtuse at the base, acute at the apex, pubes- 

 cent on both sides; peduncles 6-13 cm. long; flowers reflexed in fruit; calyx 

 densely villous, especially towards the apex; tube 2 mm. long; teeth subulate, 

 equal, plumose, 3-4 mm. long; corolla pink-purple, 12-14 mm. long. Wet 

 meadows: s Utah. L. Son. Je-Jl. 



6. T. macilentum Greene. Stem 2-4 dm. high, slender, few-leaved; leaf- 

 lets of the basal leaves ovate or broadly ovate, coarsely dentate, truncate or 

 retuse, 2-3.5 cm. long, thin, glabrous; those of the stem-leaves narrowly lance- 

 olate, acute; flowers reflexed in fruit; calyx sparingly villous; tube 2 mm. long; 

 teeth setaceous, about 2 mm. long; corolla about 15 mm. long. Meadows: s 

 Utah n Ariz. L. Son. 



7. T. Rusbyi Greene. Stems several, decumbent, 1-3 dm. long; leaflets 

 oblong to obovate, 1-2 cm. long, glabrous or slightly pubescent beneath; peduncles 

 about 1 dm. long; flowers in age reflexed; calyx villous, usually purple-tinged; 

 tube 2 mm. long; teeth subulate-setaceous, 3-4 mm. long; corolla 10-12 mm. long. 

 T. longipes pygmaeum A. Gray. Meadows: Ariz. sw Colo. Nev. Calif. 

 Submont. Mont. Je-Jl. 



8. T. orbiculatum Kenn. & McDerm. Stem 1-2 dm. high, short-pubes- 

 cent; leaflets 1-2.5 cm. long, oblong or ovate, rounded or cuspidate at the apex, 

 somewhat pubescent on the lower side; peduncles 4-10 cm. long; flowers re- 

 flexed in age; calyx dull green, 7-9 mm. long, short-pubescent; teeth 4-5 mm. 

 long; corolla about 17 mm. long. Meadows: Mont. Je. 



9. T. confusum Rydb. Stems erect, simple, 2-3 dm. high, glabrous below, 

 sparingly strigose above; leaflets of the lower leaves oval and rounded at the 

 apex, of the upper ones lanceolate, and acute, 2-3 cm. long, glabrous or nearly 

 so; peduncles 5-7 cm. long; calyx-tube 2 mm. long, glabrous except the villous 

 margin; teeth villous, 4-5 mm. long, subulate-setaceous. Meadows: s Utah. 

 L. Son. 



10. T. harneyense Howell. Stem 2-3 dm. high, glabrous or nearly so; 

 leaflets linear, 3-6 cm. long, 2-5 mm. wide, denticulate; heads mostly solitary; 

 calyx-lobes filiform, silky-hairy, longer than the scarious tube; banner with 

 rounded apiculate apex. T. tropicum A. Nels. Moist valleys: Ida. Ore. 

 Son. Je. 



11. T. pedunculatum Rydb. Stems 2-4 dm. high, rather slender, striate, 

 glabrous or nearly so; leaflets oblanceolate to linear, acute, 2-3.5 cm. long; 



