Erigeron engelmannii A. Nels.

Plants from Chaffee and Fremont counties, Colorado, have strigose leaves and the compact habit of Erigeron engelmannii but sparsely spreading-hirsute stems; they may be intermediate between E. engelmannii and E. concinnus. Unusual variation in the pappi of E. engelmannii also suggests that the species needs study and better definition.

A. Cronquist observed that "Erigeron engelmannii intergrades completely with E. pumilus, yet has two geographic subspecies of its own, and shows no distributional similarity to the [taxa] of E. pumilus," and that E. engelmannii is "smaller and more delicate, with shorter finer hairs, and [has] smaller heads with usually fewer ligules."

Perennials, 3–20(–30) cm; taprooted, caudex branches relatively short and thick. Stems erect, loosely to closely, sparsely to moderately strigose (hairs 0.1–0.9 mm), usually minutely glandular (glands barely evident), sometimes eglandular. Leaves basal (usually persistent) and cauline (petioles prominently ciliate at least on proximal portions, hairs spreading, thick-based); basal blades linear-oblanceolate, 20–100 × 1–4 mm, margins entire, faces strigose, eglandular; cauline usually restricted to proximal ¹ / 2 of stems, slightly reduced distally. Heads 1(–3). Involucres 3.5–5(–6) × 7–12 mm. Phyllaries in 2–3(–4) series, coarsely hirsuto-villous, sparsely to moderately minutely glandular. Ray florets (35–)45–100; corollas white, sometimes pink or bluish, 5–10 mm, laminae (0.8–1.1 mm wide) primarily reflexing, sometimes also weakly coiling at the tips. Disc corollas (2.5–)2.7–4.2 mm (throats indurate and inflated, densely puberulent). Cypselae 1.4–1.8 mm (oblong), 2-nerved, faces sparsely strigose; pappi: outer usually of narrow scales, sometimes 0 or of setae, inner of 12–20 bristles.

Erigeron engelmannii is a North American species of flowering plants in the family Asteraceae known by the common name Engelmann's fleabane.

Erigeron engelmannii is native to the western United States. It has been found in Arizona, New Mexico, Utah, Colorado, Wyoming, the Black Hills of South Dakota, Idaho, southern Montana, northeastern Oregon, and southeastern Washington. It is common in lithosols.

Erigeron engelmannii is a perennial herb up to 30 centimeters (12 inches) in height. It produces 1–3 flower heads per stem, each head as many as 100 white, pink, or blue ray florets surrounding numerous yellow disc florets.

Erigeron engelmannii là một loài thực vật có hoa trong họ Cúc. Loài này được A.Nelson mô tả khoa học đầu tiên năm 1899.