Pattalias palustris is a plant species in the family Apocynaceae, also known as Gulf Coast swallow wort.

[2] It is native to the southeastern United States from North Carolina to Texas, and to Mexico, Belize, Cuba, the Bahamas, Turks and Caicos Islands, and Cayman Islands.

[1] A perennial vine, it is found in areas of dunes, salt marsh, and coastal hammock within Florida and Alabama.

[3] It was originally known as Cynanchum angustifolium and subsequently known as Seutera angustifolia before it was reclassified as Pattalias palustris by Fishbein in 2017.

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