Helianthus Species, Pineland Sunflower, Rayless Sunflower, Stiff Sunflower
Helianthusradula

Family: Asteraceae (ass-ter-AY-see-ee)
Genus: Helianthus (hee-lee-AN-thus)
Species: radula (RAD-yoo-luh)

Synonym:Centrocarpha radula

Synonym:Helianthus apetalus

Synonym:Helianthus atrorubens subsp. radula

Category

Water Requirements

Sun Exposure

Foliage

Foliage Color

Height

Spacing

Hardiness
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)

Where to Grow

Danger

Bloom Color

Bloom Characteristics

Bloom Size

Bloom Time

Other details

Soil pH requirements

Patent Information

Propagation Methods

Seed Collecting