假海马齿属（学名：Trianthema）是番杏科下的一个属，为草本或亚灌木植物。该属共有20种，分布于亚洲和非洲的热带、亚热带地区。

Trianthema is a genus of flowering plants in the ice plant family, Aizoaceae. Members of the genus are annuals or perennials generally characterized by fleshy, opposite, unequal, smooth-margined leaves, a prostrate growth form, flowers with five perianth segments subtended by a pair of bracts, and a fruit with a winged lid. They are known commonly as horse purslanes.