The species of Halopeplis are succulent annual ore perennial herbs with glabrous, not jointed plant stems.

The alternate or nearly opposite leaves are fleshy, glabrous, globular or ovate, sessile and stem-clasping, with distinct or reduced leaf blades.

[1] The cylindrical spike-like inflorescences are standing laterally or terminally in the upper parts of the plants.

[2] The seed contains the half-annular,[2] uncinate or curved embryo and copious perisperm (feeding tissue).

[1][2][3] The plants are halophytes and grow on wet salty soils at sea shores, lagoons, or inland at the edge of salt lakes and in saline mudflats.