Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
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Patrick D. McMillan pdmmangustifolia_lpk2
Flower heads with 20-100+ disc florets and (usually) no ray flowers, per Flora of North America.