Microsteris gracilis, little polecat

Image Source - http://www.wmnu.edu

Intermountain Flora
Subsimple or much-branched plants up to 3 dm tall, puberulent or grandular-puberulent at least above; leaves linear or lance-linear to elliptic, or the lower obovate, up to about 5 cm long and 8 mm wide; flowers mostly in pairs at the ends of the stem and branches, one subsessile, the other evidently pedicellate, or sometimes borne singly; corolla 5-15 mm long, with white or yelllowish tube and pink to lavender limb; 2n = 14.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1984) "Intermountain Flora" pg.108, vol. 4, The New York Botanical Garden New York.