Eucephalus glabratus

(Greene) Greene

Pittonia 3: 56. 1896.

Common names: Siskiyou aster
Endemic
Basionym: Aster brickellioides var. glabratus Greene Pittonia 2: 17. 1889
Synonyms: Aster siskiyouensis A. Nelson & J. F. Macbride Eucephalus glandulosus Eastwood
Treatment appears in FNA Volume 20. Treatment on page 41. Mentioned on page 39, 40, 42.

Perennials, 30–60 cm (rhizomes branched). Stems ascending to erect, glabrous or sparsely stipitate-glandular. Leaves: mid and distal blades lanceolate to lance-ovate, 3–6 cm × 5–15 mm, ± glabrous. Heads 3–8 in corymbiform arrays. Peduncles glabrous or sparsely glandular. Involucres campanulate, 8–9 mm. Phyllaries in 3–5 series (sometimes reddish apically), lanceolate to narrowly ovate (unequal), apices acute, abaxial glabrous or sparsely glandular. Rays 0 or 1–2(–4), violet-purple. Cypselae appressed-pilose; pappus bristles in 2 series, ± smooth.


Phenology: Flowering Jul–Aug.
Habitat: Dry open oak or coniferous forest or chaparral
Elevation: 700–2300 m

Discussion

Eucephalus glabratus is found in the Klamath Mountains of northwestern California and southwestern Oregon. The species is reported to intergrade with E. breweri, E. ledophyllus, and E. tomentellus.

Selected References

None.

Lower Taxa

None.