Leucophyllum zygophyllum, the blue ranger or blue rain sage, is a species of flowering plant in the family Scrophulariaceae, native to northeastern Mexico.

[1] A shrub with attractive opposite foliage and a habit of flowering before rainstorms, it is recommended for xeriscaping.

[2] It is highly heat and drought tolerant, and is cold hardy to USDA zone 8a.

There is a cultivar, 'Cimarron', which is somewhat dwarfed, reaching 3 ft (1 m).

This Scrophulariaceae article is a stub.