Erigeron divergens, spreading daisy

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Intermountain Flora
Biennial or occasionally short-lived perennial from a taproot; stems 1-7 dm high, branched at or near the base and freely branching upwards, densely pubescent throughout teh short spreading hairs; leaves all hirsute with spreading or sometimes appressed hairs; basal leaves broadly oblanceolate to spatulate, entire or sometimes coarsely toothed or even lobed, the petiole up to 5 cm long, the blade up to ca 2.5 cm long and 1 cm wide, rarely longer, usually deciduous before flowering time; cauline leaves linear or oblanceolate, numerous, the lower ones sometimes petiolate and resembling the basal ones, but narrower, the others mostly less than 4 cm long and 5 mm wide; heads several or usually numerous in a diffuse inflorescence; disk mostly 7-11 mm wide; involucre 4-5 mm high, finely glandular and moderately to densely hirsute with rather long spreading hairs, its bracts with broad brown midvein, otherwise lightly yellow-greenish, acuminate, the inner ones broad, with thin often scarious margins, the outer ones usually narrower and slightly shorter, without thin margins; rays ca 75-190, blue, pink, or white, mostly 5-10 mm long and 0.5-1.2 mm wide; rarely and sporadically the pistillate flowers virtually rayless, and the heads thus discform; disk-corollas 2-3 mm long, the well defined basal tube surmounted by a characteristic white, nerveless, slightly indurated and slightly inflated portion of the limb 0.5-1 mm long (much as in E. pumilus); style-appendages very short and broad, or sometimes obscurely 4-nerved, the nerves usually colorless and inconspicuous; pappus double, the inner of ca 5-12 very fragile bristles, the outer of short but evident setose scales; 2n = 18, 27, 36.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1994) "Intermountain Flora" pg. 346, vol. 5, The New York Botanical Garden New York.