Publication: Fl. South. U.S. 560. 1860.
Origin: Introduced from eastern United States
selected vouchers: WTU
Notes: FNA25: "Triplasis purpurea grows in sandy soils throughout the eastern and central portion of the Flora region, extending southward through Mexico to Costa Rica. It is far more common in maritime dunes than T. americana. Plants in the Flora region belong to Triplasis purpurea (Walter) Chapm. var. purpurea."
Not in H&C; recently collected as a weed on the silty shores of the lower Columbia River in Clark Co.