Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Parthenium at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
Manual of the Southeastern Flora (Small, 1933)
Common Wild Quinine
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Richard and Teresa Ware rtw_p_integrifolium_1b
Five tiny white rays are evenly spaced around the 1/4" disc, per Wildflowers of the Southern Mountains.
Richard and Teresa Ware rtw_p_integrifolium_1c
Disc florets functionally staminate (filaments distinct, anthers connate), per Flora of North America.
JK Marlow s050618_a
June Oconee County SC
Basal leaves ovate to elliptic, 3-8" long, round-toothed, long-petioled, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
JK Marlow jkm0407c_03
July Rutherford County NC
Chimney Rock Park
Numerous small heads in flat-topped clusters at ends of stem and branches, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
JK Marlow jkm090726_136
July Buncombe County NC
Blue Ridge Parkway
Thick, rough-surfaced, sparsely toothed, alternate leaves, per Wildflowers of the Southern Mountains.
JK Marlow jkm061029_167
October Oconee County SC
Sumter National Forest: Andrew Pickens Ranger District
Achenes blackish, obovoid, slightly flattened, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
JK Marlow jkm0411g_37
November Oconee County SC
Upper leaves smaller than lower, often sessile, per Vascular Flora of the Carolinas.