Dicliptera resupinata, commonly known as the Arizona foldwing, is a species of perennial flowering plant in the family Acanthaceae. It is native to the southwestern United States and various regions of Mexico, primarily inhabiting arid and semi-arid environments.
Taxonomy and Etymology
The species was formally described by the French botanist Antoine Laurent de Jussieu, based on earlier work. It belongs to the genus Dicliptera, which is characterized by its unique floral bracts. The specific epithet resupinata refers to the "resupinate" nature of its flowers, a botanical term indicating that the flower or its pedicel is twisted 180 degrees, resulting in an inverted orientation where the technically upper parts appear on the bottom.
Description
Dicliptera resupinata typically grows as an upright or spreading perennial herb or subshrub, reaching heights between 30 and 70 centimeters. The stems are often multi-branched and may appear somewhat hexagonal in cross-section. Its leaves are simple, opposite, and generally ovate to lanceolate in shape with smooth margins.
The inflorescence consists of small clusters of flowers subtended by prominent, cordate (heart-shaped) or ovate bracts. The corolla is bilabiate (two-lipped) and typically exhibits shades of pink, purple, or magenta. These flowers are adapted for pollination by insects and occasionally hummingbirds. The fruit is a small capsule containing flat, disc-like seeds that are often dispersed via explosive dehiscence.
Distribution and Habitat
The geographic range of Dicliptera resupinata extends through the southwestern United States—most notably in Arizona and New Mexico—and southward into Mexico, including the states of Sonora, Chihuahua, and Sinaloa. It is commonly found in desert canyons, rocky slopes, washes, and along the margins of riparian areas. The species typically thrives at elevations ranging from 500 to 1,800 meters.
Ecology
As a desert-adapted species, the Arizona foldwing is drought-tolerant. Its primary flowering period occurs in the late summer and autumn, often triggered by the onset of seasonal monsoon rains. It serves as a nectar source for various native pollinators within its ecosystem. Unlike some other members of the Acanthaceae family, it is not widely cultivated for ornamental use but is recognized for its role in the biodiversity of the Sonoran and Chihuahuan Deserts.