Vascular Plants of North Carolina
Account for Southern Water-hemp - Amaranthus australis   (A. Gray) J.D. Sauer
Members of Amaranthaceae:
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Section 6 » Order Caryophyllales » Family Amaranthaceae
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Author(A. Gray) J.D. Sauer
DistributionOuter Coastal Plain and Outer Banks only. The species' northern limit is in southeastern VA.

Native of the Gulf Coast and southward to northern S.A. Adventive on the Atlantic Coast.
AbundanceRare to uncommon, but local.
HabitatMargins of brackish marshes, tidal creeks, interdune swales.
PhenologyFlowering and fruiting May-August.
IdentificationSouthern Water-hemp is much like the more common Saltmarsh Water-hemp (A. cannabinus), but may grow even taller -- plants on Ocracoke Island (Hyde County) can reach 11 feet tall! Technically, the floral bracts are more than 1 mm long in A. australis versus less than 1 mm long in that native species, and the bract midribs are usually strongly projecting (vs. scarcely so in A. cannabinus).
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Global RankG5
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