LEGUMINOS^. (PULSE FAMILY.) 55 



serrulate : flowers in dense ovate spikes, at length reflexed, ochroleucous : calyx- 

 teeth very villous, lax, nearly equalling the petals : ovary hairy. Torr. & Gray, 

 Fl. i. 313. S. W. Colorado, N. California, Oregon and Idaho. 



3. T. longipes, Nutt. Slender: stem usually glabrous, the leaflets and 

 calyx sparingly villous : leaflets narrowly oblong to linear, serrulate : heads 

 ovate, looser than in the last, not reflexed: flowers ochroleucous or tinged with 

 purple : calyx-teeth straight, more or less hairy, shorter than ihe corolla. 

 Torr. & Gray, Fl. i. 314. From N. Arizona and Colorado to the British 

 boundary, and west to the Pacific. 



Var. ( 1 ) latifolium, Hooker. Often low : leaflets broader : flowers 

 pedicellate in loose heads. With the species. 



4. T. Kingii, Watson. Glabrous tkrottahout : leaflets oblong to oblanceolate, 

 very acute, sharply denticulate : peduncles exceeding the leaves : heads naked, 

 the purplish flowers at length reflexed; the rachis often produced above the 

 head, with a few spinescent bracts : calyx-teeth about one third the length of the 

 corolla. Bot. King's Exp. 59. T. Haydeni, Porter in Hayd. Rep. 1871. 

 From Montana through Idaho and Utah to N. E. California. 



<- <- Dwarf, cespitose, acaulescent or nearly so. 

 - Glabrous : flowers large : ovary smooth, linear, 4 to 1-ovuled. 



5. T. nanum, Torr. Leaflets small, oblanceolate, serrulate, strongly veined : . 

 peduncles very short, radical : flowers 1 to 3, dark purple : calyx-teeth broad, 

 acute, shorter than the tube : ovary 4 to 5-ovuled. Mountains of Colorado and 

 Utah. 



6. T. Brandegei, Watson. Leaflets elliptic-oblong, thin, entire : peduncles 

 about equalling the leaves : flowers spicate in a loose naked head, purplish : calyx- 

 teeth lanceolate, acuminate, a little longer than the tube : ovary stipitate, 1-ovuled. 

 Proc. Am. Acad, xi. 130. S. W. Colorado and N. W. New Mexico. 



w- - Pubescent : flowers small : ovary obovate, densely villous, 2-ovuled, at length 

 exserted from the calyx. 



7. T. gymnocarpon, Nutt. Leaflets ovate-oblong to oblanceolate, ser- 

 rate : peduncles shorter than the leaves : flowers 2 to 6, in rather close heads, 

 on short pedicels : calyx-teeth equalling the tube. Torr. & Gray, Fl. i. 320. 

 Bot. King's Exp. 62, t. 8. W. Wyoming and the Wahsatch. 



# # # Leaflets 3 : heads subtended by a mostly monophyllous usually many-cleft 



involucre, axillary : flowers in whorls, sessile or nearly so, not reflexed. 

 t- Low or dwarf perennials, acaulescent or nearly so: flowers rather large: invo- 

 lucre parted, somewhat scarious. 



8. T. Pairyi, Gray. Glabrous, often stout : leaflets oblong to oblanceolate, 

 sharply dentate : bracts 5 to 7, oblong, obtuse : flowers 20 or more in a head : calyx- 

 teeth broadly subulate, equalling the tube: corolla rose-purple. Am. Jour. 

 Sci. u. xxxiii. 409. Mountains of Colorado, Utah, and Wyoming. 



9. T. dasyphyllum, Torr. & Gray. Cespitose: leaves, peduncles, and 

 calyx more or less silky : leaflets linear-lanceolate, entire : head globose, on a long 

 radical peduncle : bracts very small, unequal, lanceolate : calyx-teeth linear, 

 much longer than the tube. Mountains of Colorado, and the Uintas. 



10. T. andinum, Nutt. Cespitose, silky-can escent : leaflets rigid, cuneate- 

 oblong, entire, strongly veined : peduncles radical, about equalling the leaves : 



