Erigeron stenophyllus var. tetrapleurus
Guy L. Nesom in Flora of North America (vol. 20)
10-60 cm; taprooted, caudices branched.
erect (usually gray-green to whitish, especially proximally), densely and closely strigose, eglandular.
basal (mostly withering by flowering, not forming conspicuous tufts) and cauline (leaf bases broadened or not, not thickened and whitish-indurate); basal and proximal cauline blades linear-oblanceolate to narrowly spatulate, 15-100 × 1-6 mm, cauline gradually reduced distally, ending well proximal to heads, margins entire, faces densely and closely strigose, eglandular.
1-3(-5), from branches from midstem distally.
5-7 × 7-12(-15) mm.
in 3-4 series, loosely hirsuto-strigose, often minutely glandular.
28-40; corollas white, pink, or blue, 10-18(-20) mm, laminae coiling.
3-4.6 mm (sparsely strigoso-villous, hairs needlelike).
2-2.5 mm, 4(-6)-nerved, faces sparsely strigose;
outer of inconspicuous setae, inner of 20-35 bristles.
= 18, 36. Flowering mid Apr-Jun(-Jul). Rocky slopes, cliff bases, ledges, and crevices, sandstone outcrops and terraces, sandy soils, gravelly limestone, shale, cottonwood flood plains, creosote bush, blackbrush, blackbrush-Joshua tree, warm desert shrub, salt desert shrub, mountain brush, pinyon-juniper, oak-maple-aspen; 800-2100(-2500) m; Ariz., Calif., Colo., N.Mex., Utah.
should be expected to occur in southern Nevada.
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