Plants pilose-hirsute (often thinly so) and ±viscid throughout, especially on the cal, with wart-like glands, staining paper yellowish in drying; lfls (19-)25-39, oblong-ovate to lance-linear, 5-17 mm; spikes 2-3 cm; fls in ours purple, 12-20 mm; fr ovoid to oblong, rather chartaceous, not rigid, short-hairy and usually verrucose-glandular, the body mostly 8-15 mm, the beak to 5 mm; 2n=32. Mostly in alpine and subalpine habitats in the cordilleran region from Alas. and Yukon to Calif. and Colo., e. across most of subarctic Amer., and isolated in the Gasp顲egion and along the international boundary in ne. Minn. and adj. Ont., where it grows on slate cliffs. June. Ours is var. viscida (O. ixodes).
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.