Flora of North America species comparison

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Eucephalus breweri

Eucephalus vialis

Brewer's aster

wayside aster
Habit Perennials, 10–100 cm (caudices woody). Perennials, 60–120 cm (caudices stout).
Stems

ascending to erect, glabrate or woolly, eglandular or glandular.

erect, pilose to glandular-pubescent.
Leaves

mid and distal blades linear-lanceolate to ovate, 2–5 cm × 6–15 mm, faces glabrate and eglandular to moderately glandular and/or woolly.

middle and distal cauline blades lanceolate-elliptic, 5–9 cm × 15–30 mm, abaxial faces usually glabrous, sometimes sparsely pubescent, adaxial faces glandular-pubescent.
Peduncles

sparsely to densely woolly and glandular.

stipitate-glandular.
Involucres

turbinate-cylindric, 6–10 mm.

turbinate, 8–10 mm.
Ray florets

0.
Phyllaries

in 3–4 series (sometimes reddish along margins), lance-linear to lance-oblong, ± subequal, margins eciliate, apices acuminate, abaxial faces glabrate and eglandular to moderately woolly or glandular.

in 3–6 series (sometimes reddish at margins and apices), linear to linear-oblong (strongly unequal), apices acute to acuminate, abaxial faces stipitate-glandular.
Heads

1–15(–35) in racemiform to corymbiform or paniculiform arrays.

5–50(–120) in racemiform to paniculiform arrays.
Cypselae

strigose;

pappus bristles in 1 series (6–10 mm), barbellate.

pilose;

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

0.

2n

= 18.

Eucephalus breweri

Eucephalus vialis
Phenology Flowering Jul–Sep. Flowering Jul.
Habitat Open coniferous forest and subalpine meadows Dry open oak or coniferous woods
Elevation 1500–3000(–3500) m (4900–9800(–11500) ft) 200–500 m (700–1600 ft)
Distribution
from FNA
CA; NV
[WildflowerSearch map]
[BONAP county map]
from FNA
OR
[BONAP county map]
Discussion

Eucephalus breweri is found in the Sierra Nevada. Specimens at the northern edge of the range may intergrade with E. glabratus and E. tomentellus.

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

Of conservation concern.

Eucephalus vialis is only known from Lane and Douglas counties. It is considered threatened. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 40. FNA vol. 20, p. 42.
Parent taxa Asteraceae > tribe Astereae > Eucephalus Asteraceae > tribe Astereae > Eucephalus
Sibling taxa
E. elegans, E. engelmannii, E. glabratus, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
E. breweri, E. elegans, E. engelmannii, E. glabratus, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. tomentellus
Synonyms Chrysopsis breweri, Aster breweri, Heterotheca breweri Aster vialis
Name authority (A. Gray) G. L. Nesom: Phytologia 77: 254. (1995) Bradshaw: Torreya 20: 122. (1921)
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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