Vascular Plants of North Carolina
Account for Beach Sunflower - Helianthus debilis   Nutt.
Members of Asteraceae:
Members of Helianthus with account distribution info or public map:
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Section 6 » Order Asterales » Family Asteraceae
AuthorNutt.
DistributionSouthern 2/3rds of the Coastal Plain; also on the southern Outer Banks. First collected in 1937, most recently in 1988. A specimen from Rowan County in the Piedmont has no image and needs an ID check.

Native of southwestern GA to south-central TX. Adventive ME to MI and SC.
AbundanceRare to uncommon, to perhaps infrequent in the southwestern Coastal Plain.
HabitatRoadsides, railroad margins, fields, waste areas, vacant lots, campus weed.
PhenologyFlowering and fruiting May-August.
IdentificationThe species can easily be confused with Common Sunflower (H. annuus), due to the broad disk and the triangular leaves. However, involucral bracts of H. debilis are lanceolate and 1-3 mm wide (vs. rather ovate and 4-8 mm wide in H. annuus).
Taxonomic CommentsApparently all of our plants are subspecies cucumerifolius.

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Global RankG5
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