Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Apiales
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Richard and Teresa Ware rtw_t_pinnatifidum_cutlf
Compound umbels with 8+ spreading rays. All flowers pedicellate. Petals white, per Vascular Flora of the Carolinas.
Richard and Teresa Ware rtw_t_pinnatifidumcutlf2b
Leaves 3-4-ternate, the very numerous ultimate segments 1-3mm wide, per Weakley's Flora.