Helianthus radula

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Rayless Sunflower

Asteraceae (Compositae)

Plant Specifics

Size:very low basal rosette with a 2-2.5 ft flower stalk.
Life Span:Annual
Flower Color:Brown
Fruit Color:Brown
Noted for:Showy flowers


Recommended Uses:
Propagation:Seeds are available through the Florida Wildflowers Growers Cooperative.
Availability:Native nurseries, Seed
Light: Full Sun
Moisture Tolerance:
always floodedextremely dry
 (Usually moist, occasional inundation ----- to ----- Not wet but not extremely dry)
Moisture Tolerance: Usually moist, occasional inundation ----- to ----- Not wet but not extremely dry
Salt Water Flooding Tolerance:Not salt tolerant of inundation by salty or brackish water.
Salt Spray/ Salty Soil Tolerance:Low/no tolerance of salty wind or direct salt spray
Soil or other substrate:Loam, Sand
Soil pH:



Birds and small mammals eat the seeds.


Attracts a variety of pollinators including bees.   Attracts butterflies.

Native Habitats:Flatwoods. Moist to dry roadsides.

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
8A 8B 9A 9B 

USDA zones are based on minimum winter temperatures