© Dean Wm. Taylor · CC BY 2.0
Wikimedia Commons — CC, credited & licensed per image
Asteraceae family
Rayless Aster Eucephalus tomentellus
Native
Late-season nectar — Flowers in a late-autumn window when few other plants in our catalog bloom — valuable late forage for pollinators (relative to our catalog's bloom coverage).
Rayless Aster is a perennial wildflower native to the lower 48 states. It grows to 2.0 ft and blooms Jul – Oct.
More about this plant
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. Wikipedia →
Growing & care
USDA PLANTS · TRY Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
- Hardiness
- ≥ zone 9 derived from its U.S. range
Size & form
Sources · Size & form
TRY Plant Trait Database (CC BY 4.0) — Height · Foliage
USDA PLANTS — Lifespan
- Height
- 2.0 ft
- Lifespan
- Perennial
- Foliage
- Broadleaf
In the garden
Herb layer — Sits in the herb of a layered food forest or polyculture.Open guide →
derived roles The garden year bloom → fruit → fall colour
J
F
M
A
M
J
J
A
S
O
N
D
Bloom
Bloom (the flower's colour)
Bloom · Jul – Oct — 65 obs · Herbarium specimens — Park et al. 2023 (CC BY 4.0)
Species characteristics from USDA PLANTS (public domain) + TRY (CC BY) — general guidance, not a
guarantee for your exact site. Deer "browsing" is documented palatability, not a deer-proof claim.
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts Documented caterpillar host
Recorded feeding on Eucephalus in North America, including:
Named species (a documented Nearctic sample, not exhaustive) from NHM HOSTS (CC0).
Species thumbnails re-hosted from iNaturalist — Creative Commons, credited per image (hover for credit). Click any species to see it on iNaturalist. Not exhaustive; many taxa have no openly-licensed photo yet.
Related plants
More Eucephalus →
Native
Brewer's Aster
Eucephalus breweri
●○○○○ Native
Brickellbush Aster
Eucephalus brickellioides
●○○○○ 
Native
Cascade Aster
Eucephalus ledophyllus
●○○○○ 
Native
Elegant Aster
Eucephalus elegans
●○○○○ 
Native
Engelmann's Aster
Eucephalus engelmannii
●○○○○ Native
Gorman's Aster
Eucephalus gormanii
●○○○○ Same genus / family, ranked by ecological value — from the PlantKey catalog
Sources for this entry (15) Open & cited
[01] Scientific name & family — USDA PLANTS (DwCA, Zenodo 17903503)
[02] Growth habit & duration — USDA PLANTS (DwCA, Zenodo 17903503)
[03] Native status & distribution — USDA PLANTS (DwCA, Zenodo 17903503)
[04] Common name — USDA PLANTS (via GBIF)
[05] Invasive / introduced status — USDA PLANTS (DwCA, Zenodo 17903503) — native status
[06] Photos — Wikimedia Commons — CC, credited per image
[07] Description — Wikipedia (CC BY-SA)
[08] Ecological value — GloBI
[09] Bloom period — Herbarium specimens — Park et al. 2023 (CC BY 4.0)
[10] Foliage — TRY Plant Trait Database (CC BY 4.0)
[11] Height — TRY Plant Trait Database (CC BY 4.0)
[12] Functional traits — TRY Plant Trait Database (CC BY 4.0)
[13] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[14] Caterpillar species — NHM HOSTS (CC0)
[15] County range — GBIF Open Data — open-licensed occurrences (CC0/CC-BY) → county
Spot an error or have a better photo? Every field links to its source, and the whole dataset is open.
Cite this page Open data, please attribute
PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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