Flora of North America species comparison

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Eucephalus glabratus

Eucephalus glaucescens

Siskiyou aster, smooth aster

Klickitat aster
Habit Perennials, 30–60 cm (rhizomes branched). Perennials, 40–160 cm (with caudices; herbage glabrous, ± glaucous).
Stems

ascending to erect, glabrous or sparsely stipitate-glandular.

erect, glabrous.
Leaves

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

mid and distal blades linear to narrowly lance-elliptic, 4–10 cm × 4–16 mm.
Peduncles

glabrous or sparsely glandular.

glabrous or sparsely stipitate-glandular.
Involucres

campanulate, 8–9 mm.

turbinate to campanulate, 7–9 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 (reddish distally), linear to lanceolate or lance-ovate (unequal), apices acuminate, abaxial faces sparsely stipitate-glandular.
Heads

3–8 in corymbiform arrays.

5–20(–60) in racemiform to paniculiform arrays.
Cypselae

appressed-pilose;

pappus bristles in 2 series, ± smooth.

obconic, flattened, strigose;

pappus bristles in 2 series, smooth or ± barbellate.
Rays

0 or 1–2(–4), violet-purple.

commonly 8 or 13, purple.

Eucephalus glabratus

Eucephalus glaucescens
Phenology Flowering Jul–Aug. Flowering Jul–Sep(–Oct).
Habitat Dry open oak or coniferous forest or chaparral Open coniferous woods, meadows, brushy slopes
Elevation 700–2300 m (2300–7500 ft) 800–1500 m (2600–4900 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
WA
[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.)

Of conservation concern.

Eucephalus glaucescens is known from the vicinity of Mt. Adams in Klickitat, Skamania, and Yakima counties. Intermediates with E. ledophyllus have been reported.

(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. gormanii, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
Synonyms Aster brickellioides var. glabratus, Aster siskiyouensis, E. glandulosus Aster engelmannii var. glaucescens, Aster glaucescens, Aster glaucophyllus, Aster serrulatus, E. glaucophyllus, E. serrulatus
Name authority (Greene) Greene: Pittonia 3: 56. (1896) (A. Gray) 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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