Flora of North America species comparison

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Eucephalus tomentellus

Eucephalus glabratus

brickellbush aster, hairy rayless aster, rayless aster

Siskiyou aster, smooth aster
Habit Perennials 40–90 cm (caudices woody). Perennials, 30–60 cm (rhizomes branched).
Stems

erect, woolly or cottony.

ascending to erect, glabrous or sparsely stipitate-glandular.
Leaves

mid and distal blades lanceolate to elliptic, 2.5–6 cm × 7–20 mm, abaxial faces glabrous or glabrate, adaxial ± densely woolly to cottony.

mid and distal blades lanceolate to lance-ovate, 3–6 cm × 5–15 mm, ± glabrous.
Peduncles

pubescent.

glabrous or sparsely glandular.
Involucres

turbinate, 7–10 mm.

campanulate, 8–9 mm.
Phyllaries

in 4–6 series (often reddish at margins and apices), linear-oblong to ovate (strongly unequal), apices acute, abaxial faces tomentose to stipitate-glandular.

in 3–5 series (sometimes reddish apically), lanceolate to narrowly ovate (unequal), apices acute, abaxial glabrous or sparsely glandular.
Heads

3–40 in racemiform to paniculiform arrays.

3–8 in corymbiform arrays.
Cypselae

glabrous or pilose;

pappus bristles in 2 series, ± barbellate.

appressed-pilose;

pappus bristles in 2 series, ± smooth.
Rays

(0–)1–3(–6), violet-purple.

0 or 1–2(–4), violet-purple.

Eucephalus tomentellus

Eucephalus glabratus
Phenology Flowering Jul–Aug. Flowering Jul–Aug.
Habitat Open oak or coniferous woods, forest openings and rocky cliffs Dry open oak or coniferous forest or chaparral
Elevation 1300–2400 m (4300–7900 ft) 700–2300 m (2300–7500 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Eucephalus tomentellus grows in the Siskiyou Mountains of southwestern Oregon and northern California. It may intergrade with E. breweri and E. glabratus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 42. FNA vol. 20, p. 41.
Parent taxa Asteraceae > tribe Astereae > Eucephalus Asteraceae > tribe Astereae > Eucephalus
Sibling taxa
E. breweri, E. elegans, E. engelmannii, E. glabratus, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. vialis
E. breweri, E. elegans, E. engelmannii, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
Synonyms Sericocarpus tomentellus, Aster brickellioides, Aster tomentellus, E. bicolor, E. brickellioides Aster brickellioides var. glabratus, Aster siskiyouensis, E. glandulosus
Name authority (Greene) Greene: Pittonia 3: 55. (1896) (Greene) Greene: Pittonia 3: 56. (1896)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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