Children (14 direct children, 19 direct and indirect children):
Calyptridium arizonicum
Calyptridium monandrum
Calyptridium monospermum
Calyptridium parryi
(tree size 5)
Calyptridium pulchellum
Calyptridium pygmaeum
Calyptridium quadripetalum
Calyptridium roseum
Calyptridium umbellatum
Calyptridium nudum
Calyptridium depressum
Calyptridium hesseae
Calyptridium martirense
Calyptridium nevadense