Flora of North America species comparison

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Eucephalus glabratus

Eucephalus elegans

Siskiyou aster, smooth aster

elegant aster
Habit Perennials, 30–60 cm (rhizomes branched). Perennials 30–70 cm (caudices woody; herbage scabrous).
Stems

ascending to erect, glabrous or sparsely stipitate-glandular.

erect, moderately scabrous and/or glandular.
Leaves

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

mid and cauline blades linear-oblong or linear-lanceolate, 2–6 cm × 3–10 mm, faces moderately scabrous and ± short-stipitate-glandular.
Peduncles

glabrous or sparsely glandular.

glandular-puberulent.
Involucres

campanulate, 8–9 mm.

turbinate-cylindric, 6–9 mm.
Phyllaries

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

in 3–5 series (often purplish at margins), ovate, margins eciliate, apices acute, abaxial faces moderately to densely puberulent and glandular.
Heads

3–8 in corymbiform arrays.

3–8(–15) in racemiform to corymbiform arrays.
Cypselae

appressed-pilose;

pappus bristles in 2 series, ± smooth.

strigose;

pappus bristles in 2 series, barbellate.
Rays

0 or 1–2(–4), violet-purple.

usually 5 or 8, purple.
2n

= 18.

Eucephalus glabratus

Eucephalus elegans
Phenology Flowering Jul–Aug. Flowering Jul–Aug.
Habitat Dry open oak or coniferous forest or chaparral Open meadows, aspen forests, rocky open slopes
Elevation 700–2300 m (2300–7500 ft) 1100–3200 m (3600–10500 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; ID; MT; NV; OR; UT
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[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.)
Source FNA vol. 20, p. 41. FNA vol. 20, p. 40.
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. engelmannii, E. glabratus, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
Synonyms Aster brickellioides var. glabratus, Aster siskiyouensis, E. glandulosus Aster perelegans, E. perelegans
Name authority (Greene) Greene: Pittonia 3: 56. (1896) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 298. (1840)
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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