Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Apiales
Spreading Hedge Parsley, Spreading Bur-parsley, Field Hedge Parsley
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Richard and Teresa Ware rtw_torilis_arvensis_4
Small white flowers in compound umbels on 1-8" peduncles, w 5-9 umbellets, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.