Helianthus radula
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Rayless Sunflower
Asteraceae (Compositae)
Plant Specifics
| Form: | Flower | |
| 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 |
Landscaping
| Recommended Uses: | |||||||||||||||||||||||||||||||||||||||||||
| Propagation: | Seeds are available through the Florida Wildflowers Growers Cooperative. | ||||||||||||||||||||||||||||||||||||||||||
| Availability: | Native nurseries, Seed | ||||||||||||||||||||||||||||||||||||||||||
| Light: | Full Sun | ||||||||||||||||||||||||||||||||||||||||||
| Moisture Tolerance: |
always floodedextremely dry |
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| (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: | |||||||||||||||||||||||||||||||||||||||||||
Ecology
| Wildlife: |
Birds and small mammals eat the seeds. | |
| Insects: | 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