Perennials, 40–160 cm (with caudices; herbage glabrous, ± glaucous). Stems erect, glabrous. Leaves: mid and distal blades linear to narrowly lance-elliptic, 4–10 cm × 4–16 mm. Heads 5–20(–60) in racemiform to paniculiform arrays. Peduncles glabrous or sparsely stipitate-glandular. Involucres turbinate to campanulate, 7–9 mm. Phyllaries in 3–5 series (reddish distally), linear to lanceolate or lance-ovate (unequal), apices acuminate, abaxial faces sparsely stipitate-glandular. Rays commonly 8 or 13, purple. Cypselae obconic, flattened, strigose; pappus bristles in 2 series, smooth or ± barbellate.
Phenology: Flowering Jul–Sep(–Oct).
Habitat: Open coniferous woods, meadows, brushy slopes
Elevation: 800–1500 m
Of conservation concern.
Eucephalus glaucescens is known from the vicinity of Mt. Adams in Klickitat, Skamania, and Yakima counties. Intermediates with E. ledophyllus have been reported.