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Swamp Sunflower

Helianthus angustifolius

Other common name(s):

Narrowleaf Sunflower, Narrow-leaved Sunflower

Family:

Asteraceae (Aster Family)

Plant Ecoregion Distribution Map

Gulf Coast Prairies and Marshes, Western Gulf Coastal Plain
Lower Rio Grande Valley, Northern Humid Gulf Coastal Prairies
Flatwoods, Floodplains and Low Terraces3, Pleistocene Fluvial Terraces, Red River Bottomlands, Southern Tertiary Uplands, Tertiary Uplands

Plant Characteristics

Growth Form

Herbaceous

Height

3
to
6
ft.

Spread

0.5
to
1
ft.

Leaf Retention

Deciduous

Lifespan

Perennial

Habitat and Care Requirements

Soil Type(s)

Moist

Light Requirement

Sun, Part Shade

Water Requirement

High

Native Habitat

Wetland or Riparian

Bloom and Attraction

Bloom Color

Yellow

Bloom Season

Fall

Seasonal Interest

Seeds, Nectar, Larval Host

Wildlife Benefit

Butterflies, Birds

Maintenance

Low maintenance. Can be gangly, plant in back of beds. Propagation: Seed.

Comments

Blooms August-November. Spreads by rhizomes. Nectar: Bordered Patch, Monarch. Larval Host: Bordered Patch
Previous Scientific Name(s): Synonym(s): Helianthus angustifolius var. planifolius

References

1) Griffith, Bryce, Omernick & Rodgers (2007). Ecoregions of Texas. 2) Wasowski and Wasowski, Native Texas Plants Landscaping Region by Region, 1991, pg. 376. 3) https://www.wildflower.org/plants/result.php?id_plant=HEAN2. 4) https://portal.torcherbaria.org/portal/taxa/index.php?taxon=Helianthus+angustifolius&formsubmit=Search+Terms. 5) http://bonap.net/TDC/Image/Map?taxonType=Species&taxonId=3345&locationType=County&mapType=Normal. 6) https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=502919#null

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