Eucephalus vialis


Torreya 20: 122. 1921.

Common names: Wayside aster
EndemicConservation concern
Synonyms: Aster vialis (Bradshaw) S. F. Blake
Treatment appears in FNA Volume 20. Treatment on page 42. Mentioned on page 39.

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.

Selected References


Lower Taxa