Vascular Plants of North Carolina
Account for Triangle Orach - Atriplex prostrata   Boucher ex A.P. de Candolle
Members of Chenopodiaceae:
Members of Atriplex with account distribution info or public map:
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Section 6 » Order Caryophyllales » Family Chenopodiaceae
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AuthorBoucher ex A.P. de Candolle
DistributionCoastal; believed to be not native in the eastern U.S., and possibly not even native at all in North America. Definitely Eurasian in native origin. The Rockingham County collection is from a railroad track in Reidsville.

Native to Eurasia; in N.A. east and west coasts and inland in saline soils.
AbundanceUncommon on the outer Coastal Plain and Outer Banks; disjunct and rare inland. The State Rank is SE? -- Probably exotic.
HabitatTidal marshes and marsh edges; brackish flats.
PhenologyFlowering and fruiting July-November.
IdentificationBoth this species and A. dioica have broadly to narrowly triangular leaves, usually with 2 basal pointy lobes. According to FNA, leaves of dioica are more likely to be narrow, thick-textured, and surfaces scurfy, whereas prostrata leaves are broad, thin-textured, and not scurfy.
Taxonomic CommentsWeakley (2018) recognized A. patula sensu stricto as distinct from A. prostrata, but in 2020, he moved it into that species.

Members of the genus are most often found in saline to brackish sands. Male flowers usually produce petals, but females do not; in any event they are very small and not at all showy. Weakley's (2018) key must be used with care, and a dissecting scope is almost essential for successful identification.
Other Common Name(s)
State RankSE? *
Global RankG5
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