Flora of North America species comparison

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Eucephalus glabratus

Eucephalus gormanii

Siskiyou aster, smooth aster

Gorman's aster
Habit Perennials, 30–60 cm (rhizomes branched). Perennials, 10–40 cm (caudices woody or rhizomes short-creeping; herbage sparsely to moderately glandular-hairy, not glaucous).
Stems

ascending to erect, glabrous or sparsely stipitate-glandular.

ascending to erect, sparsely to moderately glandular-hairy.
Leaves

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

mid and distal blades lance-ovate to elliptic, 1.5–3 cm × 4–10 mm.
Peduncles

glabrous or sparsely glandular.

glandular.
Involucres

campanulate, 8–9 mm.

turbinate, 6–8 mm.
Phyllaries

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

in 2–4 series (whitish), lanceolate to ovate (unequal), apices acute, abaxial face glabrous or glandular-hairy.
Heads

3–8 in corymbiform arrays.

usually 2–5 in racemiform to corymbiform arrays, sometimes borne singly.
Cypselae

appressed-pilose;

pappus bristles in 2 series, ± smooth.

pilose;

pappus bristles in 2 series smooth or ± barbellate.
Rays

0 or 1–2(–4), violet-purple.

(5–)8–13, white (often pinkish in bud).
2n

= 18.

Eucephalus glabratus

Eucephalus gormanii
Phenology Flowering Jul–Aug. Flowering Jul–Aug.
Habitat Dry open oak or coniferous forest or chaparral Open rocky slopes and exposed cliffs
Elevation 700–2300 m (2300–7500 ft) 1200–1900 m (3900–6200 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
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.

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

Eucephalus gormanii is known only from the central Cascade Mountains. It is closely related to E. paucicapitatus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 41. FNA vol. 20, p. 41.
Parent taxa Asteraceae > tribe Astereae > Eucephalus Asteraceae > tribe Astereae > Eucephalus
Sibling taxa
E. breweri, E. elegans, E. engelmannii, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
E. breweri, E. elegans, E. engelmannii, E. glabratus, E. glaucescens, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
Synonyms Aster brickellioides var. glabratus, Aster siskiyouensis, E. glandulosus Aster gormanii
Name authority (Greene) Greene: Pittonia 3: 56. (1896) Piper: Proc. Biol. Soc. Wash. 29: 101. (1916)
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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