Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Orach at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Atriplex patula var. hastata
Thinleaf Orach, Fat-hen, Triangle Orach