The fruits are red and range from spherical to broadly elongated, 6 to 8 mm (0.24 to 0.31 in) in diameter.

[3] Cochemiea poselgeri is widespread in Baja California Sur, Mexico at elevations of 0 to 120 meters.

It is found growing on flat sandy areas, on rocks and hanging off cliffs and ridges.

Plants are found growing among Cochemiea fraileana, Cochemiea schumannii, Cochemiea dioica, Lophocereus schottii, Stenocereus gummosus, Echinocereus brandegeei, Echinocereus barthelowanus, Pachycereus pringlei, Pachycereus pecten-aboriginum, Stenocereus thurberi, Ferocactus townsendianus, Peniocereus johnstonii, Opuntia tapona, Cylindropuntia molesta, Opuntia invicta, Cylindropuntia cholla and Jatropha cinerea.

[5] Nathaniel Lord Britton and Joseph Nelson Rose reclassified it into the genus Cochemiea in 1923.