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Your search found 7 taxa.
Heads discoid. Pappus whitish to stramineous [straw-like], per Flora of North America.
Flowers of the genus Vernonia are all discoid, all bisexual, per Vascular Flora of the Carolinas.
32-48 disk flowers per head (no ray flowers), per Atlantic Coastal Plain Wildflowers.
Flower heads consist of 30-65 tubular disk flowers (no ray flowers), per Atlantic Coastal Plain Wildflowers.
13-30 flwrs per head (vs. 30-55 in V. noveboracensis), in terminal corymbs, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
Stem leaves abundant, stems glabrous. Flowers 16-26 per head, per Wildflowers of the Eastern United States.
Heads discoid, 10-12 florets per head, per Flora of North America.
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