Wildflowers of the United States

Home Journal Family Index - All States Photo Albums News About Privacy

Swamp Sunflower, Narrow-leaf Sunflower - Helianthus angustifolius


Family: Asteraceae Aster family Genus Common Name: Sunflower Native Status: Native
Helianthus angustifolius - Swamp Sunflower, Narrow-leaf Sunflower. aka Narrow-leaved Sunflower. Relatively easy sunflower to identify due to the narrow leaves, which are no longer than normal for a sunflower, but much narrower. The stem of Helianthus angustifolius has coarse hairs, especially on the lower part of the plant. The leaves also have hairs on the edge near the stem. Narrow-leaf sunflower has yellow ray flowers with darker disk flowers than many other sunflowers.

Leave comments on Helianthus angustifolius at this link.

Distribution of Helianthus angustifolius in the United States and Canada:
USDA Plants Distribution Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2009. The PLANTS Database (http://plants.usda.gov, 22 Aug 2014). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Search Our Database of Species
Enter any portion of the Scientific
or Common Name (or both)

Scientific name:
Common name:

Example: Enter "lob" in the common name field and you'll get all our species that have "lobelia" in the common name, as well as "sharp-lobed hepatica".

Do a general Google search of the entire site:




Follow on Twitter
Follow USWildflowers on Twitter




Site: Walker County, GA Date: 2009-October-03Photographer: Gerald C. Williamson
Helianthus angustifolius may have as few as 8 ray flowers or as many as 20 surrounding the dark disk. The ray flowers are between 3/4 and 1.5 inches long. The disk is usually an inch across or less. The disk flowers develop the seeds, which are useful for wildlife.
Helianthus angustifolius

Site: Walker County, Ga Date: 2009-October-03Photographer: Gerald C Williamson
Narrow-leaf sunflower plants will bear many flowering heads.
Click on the photo for a larger image
Helianthus angustifolius

Site: Walker County, Ga Date: 2009-October-03Photographer: Gerald C Williamson
The leaves are up to 6 inches long and rarely more than inch wide, alternating as they rise up the stem. The branches of the plant form at the leaf axils.
Click on the photo for a larger image
Helianthus angustifolius

Site: Walker County, Ga Date: 2009-October-03Photographer: Gerald C Williamson
Each of the several to many branches of Helianthus angustifolius terminate in a blossom.
Click on the photo for a larger image
Helianthus angustifolius

Looking for Wildflowers for a specific state? Check here:



All content except USDA Plants Database map Copyright Gerald C. Williamson 2014
Photographs Copyrighted by the named photographer