25. Erigeron chrysopsidis A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 210. 1884.
Dwarf yellow fleabane
Chrysopsis hirtella de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 327. 1836, not Erigeron hirtellus de Candolle 1836
Perennials, 3–15 cm; taprooted, caudices branched. Stems erect (bracteate), evenly hispidulous to hirsute, usually minutely glandular. Leaves mostly basal (in tufts, persistent) (petioles prominently ciliate, hairs spreading, thick-based); blades linear to linear-oblanceolate, 40–70(–90) × 1–3 mm, cauline reduced to bracts (bases relatively thin, not sheathing), margins entire, coarsely ciliate, faces hispidulous to loosely strigose. Heads 1. Involucres (3.5–)4.5–7.5 × 9–17 mm. Phyllaries in 2–3 series, sparsely hispid, minutely glandular. Ray (pistillate) florets 20–60; corollas tubular, lacking laminae, or laminae yellow (sometimes fading on drying and appearing whitish or creamy), 2–10 mm, not coiling or reflexing. Disc corollas 4–4.5 mm (throats tubular). Cypselae 2–2.5 mm, 2-nerved, faces sparsely strigose (carpopodia yellowish); pappi: outer of inconspicuous setae, inner of 15–25 bristles.
Varieties 3 (3 in the flora): w United States.
Intermediates between var. austiniae and var. chrysopsidis are formed in Oregon and Idaho, where their ranges overlap.