Cryptantha flavoculata, yellow-eye cryptanth

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Intermountain Flora
Long-lived perennial with a taproot and branching caudex, with more or less numerous equal or subequal stems mostly (0.5) 1-3 dm tall and a persistent mat of basal leaves; stem with spreading, bristly hairs mostly 1.5-2.5 mm long, and with a finer, shorter, softer, loose or appressed under-pubescence; leaves densely and rather coarsely strigose to sericeous-puberulent on both sides (commonly more densely so beneath) and also with appressed, pustulate bristles on the lower side, often (especially the cauline ones) more spreading-bristly along the margins, commonly with a characteristic gray-green appearance in life; basal leaves oblanceolate, mostly 3-10 cm long and 3-15 mm wide; cauline leaves similar or somewhat smaller, usually less strongly petiolate or sessile; inflorescence densely spreading-bristly, rather densely cylindric (or subcapitate in small plants), not opening out much in age; flowers heterostylic; calyx-segments 5-7 mm long at anthesis, up to 8-10 mm in fruit; corolla white with prominent yellow fornices (these erect, oblong, as high as or higher than wide, mostly 1-1.5 mm high), the tube 7-10 mm long surpassing the calyx by 2-5 mm, without crests at the base, the limb mostly 7-12 mm wide, spreading or sometimes with the lobes soon becoming reflexed; nutlets lance-ovate, 2.5-3.8 mm long and 1.5-2 mm wide, conspicuously rugose or rugose-tuberculate and also more finely tuberculate on both sides, the ridges high, often short or interrupted, the scar conspicuously open, with an evidently raised margin, often with a constriction below the middle; style surpassing the nutlets by 2.5-9 mm.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1984) "Intermountain Flora" pg.238, vol. 4, The New York Botanical Garden New York.