Rayless sunflower
Helianthus radula
Last reviewed: September 2026
Rayless sunflower (Helianthus radula) is a perennial forb native to AL, FL, GA, LA and 2 more states. It blooms in September, October, and November. The flowers draw native bees and butterflies.
Toxicity unknown
Rayless sunflower (Helianthus radula) 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
full sun
Water
medium
Size
12"–24" H × 12"–18" W
Bloom
Sep, Oct, Nov
Native to
AL, FL, GA, LA and 2 more states
Pollinators
native bees, butterflies
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 458 programs across 44 states, each with a link to the provider and the date we last checked it.
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An unusual sunflower relative with basal leaves and slender stalks topped by disc-only flower heads that lack the typical yellow rays. It grows in wet pine savannas and seasonally moist flatwoods.
Growing Rayless sunflower
Grow Rayless sunflower in full sun and medium water. Mature plants reach 12 to 24 inches tall and spread 12 to 18 inches wide.
Wildlife value
The exposed disc flowers provide pollen and nectar for native bees and small butterflies in fall.
Common questions
- How much sun does Rayless sunflower need?
- Rayless sunflower grows best in full sun conditions.
- When does Rayless sunflower bloom?
- Rayless sunflower blooms in September, October, and November.
- Where is Rayless sunflower native?
- Rayless sunflower (Helianthus radula) is native to AL, FL, GA, LA and 2 more states, per the World Checklist of Vascular Plants (Kew).
- What pollinators does Rayless sunflower attract?
- Rayless sunflower draws native bees and butterflies.
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 sunflower? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.