Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Longleaf Sunflower at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
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Richard and Teresa Ware rtw_h_longifolius
Leaves 10-20x as long as wide, basally disposed, glabrous, per Weakley's Flora.
Richard and Teresa Ware rtw_h_longifolius_4b
8-13 ray florets. Disc florets' lobes yellow; anthers dark, appendages dark, per Flora of North America.