Dwarf Yellow Fleabane

Intermediates between var. austiniae and var. chrysopsidis are formed in Oregon and Idaho, where their ranges overlap.

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.

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

Erigeron chrysopsidis is a North American species of flowering plants in the family Asteraceae known by the common name dwarf yellow fleabane. It is found in the western United States: southeastern Washington, Oregon, extreme northern California, northern Nevada, Idaho.

Erigeron chrysopsidis is a very small perennial herb up to 15 cm (8 inches) tall, forming a taproot. Most of the leaves are low and close to the ground. Each stem produces only one flower head, with 20-60 yellow ray florets plus numerous yellow disc florets.

Varieties Erigeron chrysopsidis var. austiniae (Greene) G.L.Nesom - California, Idaho, Nevada, Oregon Erigeron chrysopsidis var. brevifolius Piper - Oregon Erigeron chrysopsidis var. chrysopsidis - Oregon, Washington