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Eucephalus tomentellus
Specimen from California, 2005
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Eucephalus
Species:	E. tomentellus
Binomial name
Eucephalus tomentellus (Greene) Greene 1896
Synonyms
Sericocarpus tomentellus Greene 1889 Aster tomentellus (Greene) Frye & Rigg 1912 not Hook. & Arn. 1833 Eucephalus bicolor Eastw. Eucephalus brickellioides (Greene) G.L.Nesom

Eucephalus tomentellus is a North American species of flowering plant in the family Asteraceae known by the common name Brickellbush aster or rayless aster. It grows on openings in oak or conifer forests the Siskiyou Mountains of the US States of California and Oregon.

Eucephalus tomentellus is a perennial herb up to 90 cm (3 feet) tall, with a woody caudex. Stems are covered with woolly or cottony hair. Leaves are whitish and waxy. One plant will usually produce 3-40 flower heads in a large array. Each head has 0-6 purple-violet ray florets surrounding numerous yellow disc florets.

References

1. The Plant List, Eucephalus tomentellus (Greene) Greene
2. Biota of North America Program 2014 county distribution map
3. Calflora taxon report, University of California, Eucephalus tomentellus (Greene) Greene, rayless aster
4. Flora of North America, Eucephalus tomentellus (Greene) Greene, Pittonia. 3: 55. 1896. Brickellbush aster

• Astereae
• Flora of Oregon
• Flora of California
• Plants described in 1889