Calliandra physocalyx is a species of flowering plants of the genus Calliandra in the Fabaceae family, endemic to southwestern Mexico. It is a shrub with pink-and-white or pink-and-red flowers. Like other members of the genus Calliandra, the filaments of the stamens are long and colourful, in this case about 7.5 centimetres (3.0 in) long. The species was first scientifically described in 1988.