LEGUMINOSAE (PEA FAMILY) 279 



7. Trifolium Brandegei Wats. Proo. Am. Acad. 11: 130. 1876. Dwarf 

 perennial, caespitose and acaulescent, glabrous, the inflorescence slightly 

 villous: stipules scarious; leaflets elliptic-oblong, thin, acutish, entire, 15-20 

 mm. long: peduncles about equaling the leaves; flowers spicate, in a loose 

 naked head, purplish, 12-14 mm. long: calyx-teeth lanceolate, acuminate, a 

 little longer than the campanulate tube: ovary stipitate, 7-ovuled. — Southern 

 Colorado and New Mexico. 



8. Trifolium nanum Torr. Ann. Lye. N. Y. 1: 35. 1824. Depressed- 

 caespitose glabrous perennial, 2-5 cm. high: leaflets small, oblanceolate, ser- 

 rulate, strongly veined: peduncles very short, radical; flowers large, 1-3, dark 

 purple: calyx-teeth broad, acute, shorter than the tube: ovary 4-5-ovuled. — 

 Mountains of Colorado and Utah. 



9. TrifoUum gymnocarpon Nutt. T. & G. Fl. N. A. 1: 320. 1838. A 

 small caespitose perennial with short, thick caudex: leaves mostly radical; 

 leaflets oval-oblong, obtuse, serrate, glabrous above; stipules scarious, oval: 

 stems very short, a little leafy at summit: peduncles equaling the leave?; 

 heads 5-6-flowered: calyx-segments subulate, as long as the tube: pod hairy, 

 reticulate, rugose, 1-2-seeded, stipitate. — Dry hills and plains; Colorado, 

 Wyoming, and westward. 



9a. Trifolium' gymnocarpon subcaulescens (Gray) A. Nels. Leaflets 

 cinereous-pubescent or slightly lanate beneath, quite glabrous above: other- 

 wise like the species, (r. sMbcawZesceris Gray, Ives. Rep. 10. 1S50; T.nemorale 

 Greene, Pitt. 4: 136. 1900.) — Southwestern Colorado. 



10. Trifolium Parryi Gray, Am. Journ. Sci. II. 33: 409. 1862. Acaules- 

 cent or nearly so, glabrous, the scape and petioles rather stout, 7-15 cm. 

 high: leaflets 15-25 mm. long, oblong to oblanceolate, sharply dentate: in- 

 volucre scarious, 5-7-parted; heads large, many-flowered: calyx-teeth broadly 

 subulate, as long as the tube: corolla purplish-red or rose-purple: pod sessile, 

 3-4-seeded. (T. Tnontanmse Rydb. Mem. N. Y. Bot. Gard. 1: 236. 1900 is 

 a dwarf form from alpine summits in Montana; possibly distinct.) — Frequent 

 in open spruce woods at high elevations throughout our mountains. 



11. Trifolium dasyphyllum T. & G. Fl. N. A. 1: 315. 1838. Densely caes- 

 pitose; caudex short and thick, branching: peduncles and calyx silky^ with 

 brownish hairs: leaflets lanceolate or oblong-laneeolate, acute or acuminate, 

 entire; stipules membranaceous: heads globose, many-flowered, on a rather 

 long radical peduncle: calyx-teeth subulate-setaceous, exceeding the tube: 

 corolla bicolored, the standard ochroleucous, the wings and tip of the keel 

 deep purple: pod 3-4-seeded. {T. bracteolatum Rydb. Bull. Torr. Bot. Club 

 28: 500. 1901.) — Frequent; at subalpine stations in our range: 



12. Trifolium anemophilimi Greene, Pitt. 4; 137. 1900. Closely allied to 

 the preceding, depressed-caespitose and spreading: foliage and peduncles 

 white with silvery-silky close indument: bracts of the involucre several, un- 

 equal, scarious-margined', hnear-lanceolate: calyx-teeth often nearly twice as 

 long as the tube: corolla purple; the standard broadly elliptic. (T. scariosum 

 A. Nels. Bull. Torr. Bot. Club 29: 401. 1902; ,T. stenolohum Rydb. Bull. Torr. 

 Bot. Club 28: 499. 1901.) — Naked limestone slopes, middle elevations; Wy- 

 oming and Colorado. 



13. Trifolium attenuatum Greene, Pitt. 4: 137. 1900. AlUed to the two 

 foregoing, less caespitose, greener and nearly erect, 5-12 cm. high, rather 

 sparsely silky-hairy: leaflets mostly linear, 2-4 cm. long: peduncles and leaves 

 subequal: involucral bracts sho^ and relatively broad: calyx-teeth slender, 

 variable: corolla deep red-purple; the standard acuminate and well surpassing 

 the other petals: pedicels deflexed in age. — Among the rocks, at alpine sta- 

 tions; southern Colorado to New Mexico. 



14. TrifoUum andinum Nutt. T. & G. Fl. N. A. 1: 314. 1838. Depressed, 

 caespitose, and densely silky-canescent: caudex short, thick, and branching: 

 leaves mostly radical; leaflets cuneate-oblong, apiculate; stipules broadly 

 ovate, membranaceous: heads on very short scapes with two bract-like sheath- 

 ing leaves at base: calyx densely villous; its teeth subulate, shorter than the 

 tube: pod usually 1-seeded. — Dry barren hills; central Wyoming. 



