Erigeron nematophyllus Rydb.

Perennials, 4–18 cm; taprooted, caudex branches relatively short, thick. Stems erect (greenish), usually closely appressed-strigose, sometimes glabrate, eglandular. Leaves mostly basal or basal (persistent, persistent portion relatively long and slender-fibrous) and cauline (greenish); basal blades 1-nerved linear to linear-oblanceolate or oblanceolate or narrowly spatulate, (20–)30–80 × (0.5–)1–3 mm, cauline reduced distally (bases attenuate, not thickened and whitish-indurate) margins entire (apices obtuse or rounded), faces abaxially glabrous or glabrate, adaxially sparsely strigose, eglandular. Heads 1(–3 rarely, from branches at midstem). Involucres (3.5–)4-–6.5 × (5–)6–13 mm. Phyllaries in 2–4 series (greenish or sometimes purple, margins thickened), strigose to loosely strigoso-hirsute, sometimes more densely so on distal ¹ / 3 , sparsely minutely glandular. Ray florets 15–55; corollas white to pink, 4–8 mm, laminae coiling. Disc corollas (2.8–)3.5–4.3 mm. Cypselae 2.2–2.9 mm, 2-nerved, faces and margins villoso-hirsute, sometimes more densely so on nerves; pappi: outer of setae, inner of 15–25 bristles.

Erigeron nematophyllus is a North American species of flowering plant in the family Asteraceae known by the common name needle-leaf fleabane. It native to the western part of the United States, in Utah, Colorado, and Wyoming.

Erigeron nematophyllus is a small perennial herb rarely more than 18 centimeters (7.2 inches) tall, producing a taproot. The leaves are very narrow and thread-like or needle-like. The plant generally produces only 1-3 flower head per stem, each head with up to 55 white or pink ray florets surrounding numerous yellow disc florets. The species grows on sandy or rocky soil in sagebrush flats or conifer woodlands.