FNPS Plant Database

Helianthus heterophyllus

variableleaf sunflower
  • Photo by: Jeannie Brodhead, Saracennia Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS

Nomenclature

Common Name:

variableleaf sunflower

Synonym(s):

Genus species:

Helianthus heterophyllus

Family:

Asteraceae (Compositae)

Plant Specifics

Form:

flower

Size:

4 ft

Life Span:

Long-lived perennial

Flower Color:

yellow with reddish purple center

Fruit Color:

Phenology:

Winter dormant. Basal leaf rosette, few leaves on stalk, spreads by underground rhizomes. Blooms best after fire Aug.-Oct.

Noted For:

Showy Flowers

Landscaping

Recommended Uses:

Moist wildflower meadows.

Considerations:

Availability:

Native Nurseries, FNPS Plant Sales, Seed

Propagation:

Seed or division of a cluster. 

Light:

Full Sun

Moisture Tolerance:

Always Flooded---------------------------------Extremely Dry

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Stays wet -to- Somewhat moist, no flooding

Salt Water Flooding Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Unknown

Soil or Other Substrate:

Sand, Loam

Soil pH:

Acidic

Suitable to Grow In:

8A,8B,9A,9B

USDA zones are based on the average annual extreme minimum winter temperature.



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Ecology

Wildlife:

Pollinators, Birds, Mammals

Primarily pollinated by bees.  

Birds and small mammals eat the seeds.

Native Habitats:

Moist to wet areas, marsh edges, seep slopes, savannas.

Natural Range in Florida:

Comments:

Ethnobotany:

General Comments:

Citations:

Nelson, Gil. (2005). East Gulf Coastal Plain Wildflowers. Falcon Guides, Guilford, CT.


Taylor, Walter K. (2013). Florida Wildflowers: A Comprehensive Guide. University Press of Florida, Gainesville.


Tobe, J.D. et al. (1998). Florida Wetland Plants, An Identification Manual. p. 316-318. Florida Department of Environmental Protection, Tallahassee.


Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. (1999+). Atlas of Florida Plants. ( https://florida.plantatlas.usf.edu/ ). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.

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