Flora of North America species comparison

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Eucephalus tomentellus

Eucephalus gormanii

brickellbush aster, hairy rayless aster, rayless aster

Gorman's aster
Habit Perennials 40–90 cm (caudices woody). Perennials, 10–40 cm (caudices woody or rhizomes short-creeping; herbage sparsely to moderately glandular-hairy, not glaucous).
Stems

erect, woolly or cottony.

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

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

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

pubescent.

glandular.
Involucres

turbinate, 7–10 mm.

turbinate, 6–8 mm.
Phyllaries

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

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

3–40 in racemiform to paniculiform arrays.

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

glabrous or pilose;

pappus bristles in 2 series, ± barbellate.

pilose;

pappus bristles in 2 series smooth or ± barbellate.
Rays

(0–)1–3(–6), violet-purple.

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

= 18.

Eucephalus tomentellus

Eucephalus gormanii
Phenology Flowering Jul–Aug. Flowering Jul–Aug.
Habitat Open oak or coniferous woods, forest openings and rocky cliffs Open rocky slopes and exposed cliffs
Elevation 1300–2400 m (4300–7900 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 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.)

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. 42. FNA vol. 20, p. 41.
Parent taxa Asteraceae > tribe Astereae > Eucephalus Asteraceae > tribe Astereae > Eucephalus
Sibling taxa
E. breweri, E. elegans, E. engelmannii, E. glabratus, E. glaucescens, E. gormanii, E. ledophyllus, E. paucicapitatus, E. vialis
E. breweri, E. elegans, E. engelmannii, E. glabratus, E. glaucescens, E. ledophyllus, E. paucicapitatus, E. tomentellus, E. vialis
Synonyms Sericocarpus tomentellus, Aster brickellioides, Aster tomentellus, E. bicolor, E. brickellioides Aster gormanii
Name authority (Greene) Greene: Pittonia 3: 55. (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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