Torreya 20: 122. 1921.
Perennials, 60–120 cm (caudices stout). Stems erect, pilose to glandular-pubescent. Leaves: middle and distal cauline blades lanceolate-elliptic, 5–9 cm × 15–30 mm, abaxial faces usually glabrous, sometimes sparsely pubescent, adaxial faces glandular-pubescent. Heads 5–50(–120) in racemiform to paniculiform arrays. Peduncles stipitate-glandular. Involucres turbinate, 8–10 mm. Phyllaries in 3–6 series (sometimes reddish at margins and apices), linear to linear-oblong (strongly unequal), apices acute to acuminate, abaxial faces stipitate-glandular. Ray florets 0. Cypselae pilose; pappus bristles in 2 series, smooth or ± barbellate.
Phenology: Flowering Jul.
Habitat: Dry open oak or coniferous woods
Elevation: 200–500 m
Of conservation concern.
Eucephalus vialis is only known from Lane and Douglas counties. It is considered threatened. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.