Calyptridium is a genus of flowering plants belonging to the family Montiaceae.
Its native range is Northern America, Southern South America.
Species: Calyptridium hesseae , syn. Calyptridium parryi var. hesseae Calyptridium martirense Calyptridium monandrum Calyptridium monospermum Calyptridium nevadense Calyptridium parryi , including Calyptridium arizonicum , syn. Calyptridium parryi var. arizonicum Calyptridium pulchellum Calyptridium pygmaeum Calyptridium quadripetalum Calyptridium roseum Calyptridium umbellatum
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