Flora of North America species comparison

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Eucephalus elegans

Eucephalus tomentellus

elegant aster

brickellbush aster, hairy rayless aster, rayless aster
Habit Perennials 30–70 cm (caudices woody; herbage scabrous). Perennials 40–90 cm (caudices woody).
Stems

erect, moderately scabrous and/or glandular.

erect, woolly or cottony.
Leaves

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

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

glandular-puberulent.

pubescent.
Involucres

turbinate-cylindric, 6–9 mm.

turbinate, 7–10 mm.
Phyllaries

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

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

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

3–40 in racemiform to paniculiform arrays.
Cypselae

strigose;

pappus bristles in 2 series, barbellate.

glabrous or pilose;

pappus bristles in 2 series, ± barbellate.
Rays

usually 5 or 8, purple.

(0–)1–3(–6), violet-purple.
2n

= 18.

Eucephalus elegans

Eucephalus tomentellus
Phenology Flowering Jul–Aug. Flowering Jul–Aug.
Habitat Open meadows, aspen forests, rocky open slopes Open oak or coniferous woods, forest openings and rocky cliffs
Elevation 1100–3200 m (3600–10500 ft) 1300–2400 m (4300–7900 ft)
Distribution
from FNA
CO; ID; MT; NV; OR; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
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[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.)
Source FNA vol. 20, p. 40. FNA vol. 20, p. 42.
Parent taxa Asteraceae > tribe Astereae > Eucephalus Asteraceae > tribe Astereae > Eucephalus
Sibling taxa
E. breweri, 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. vialis
Synonyms Aster perelegans, E. perelegans Sericocarpus tomentellus, Aster brickellioides, Aster tomentellus, E. bicolor, E. brickellioides
Name authority Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 298. (1840) (Greene) Greene: Pittonia 3: 55. (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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