English: Chiricahua rock flower; Cliff brittlebush; Apache bush.
Genus: 1 species.
Clades: Crossosomataceae.
Region: Chiricahua Mountains, Arizona.
Habitat: rocky desert, cliffs, riparian woodlands, chaparral.

BotanyType: shrub, up to h50 cm tall, 100 cm wide.
Stem: hard, spine-like twigs.
Leaves: opposite; few millimeters long.
Flowers: solitary; petals 4, white to cream-colored, or occasionally pink, 5 to 6 millimeters long.
Fruit: follicle with 1 or 2 brown seeds.
DD Crossosoma: alternate leaves, pentamerous.