Rayless arnica
Arnica discoidea
Last reviewed: August 2026
Toxicity unknown
Rayless arnica (Arnica discoidea) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
part shade
Water
low
Size
8"–20" H × 8"–12" W
Bloom
Apr, May, Jun, Jul
Native to
CA, NV, OR, WA
Pollinators
bees, flies
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.
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A woodland perennial with paired hairy leaves and slender stems topped by yellow, button-like flower heads that lack the typical ray petals of most daisies.
Wildlife value
Provides nectar and pollen for small native bees and flies in forest openings.
Common questions
- How much sun does Rayless arnica need?
- Rayless arnica grows best in part shade conditions.
- When does Rayless arnica bloom?
- Rayless arnica blooms in April, May, June, and July.
- Where is Rayless arnica native?
- Rayless arnica (Arnica discoidea) is native to CA, NV, OR, WA, per the World Checklist of Vascular Plants (Kew).
- What pollinators does Rayless arnica attract?
- Rayless arnica draws bees and flies.
Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Rayless arnica? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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