Christia Genus

Christia is a genus of flowering plants in the family Fabaceae (legume family), placed in the subfamily Faboideae and the order Fabales. The genus comprises around 11 accepted species of herbs and subshrubs native to tropical and subtropical Asia, with representation extending into northern Australia.

Plants in the genus are typically perennial subshrubs or herbaceous plants. The leaves are compound and trifoliate, with the terminal leaflet distinctly larger than the two lateral leaflets — a characteristic that gives some species a striking, asymmetrical appearance. The best-known member, Christia vespertilionis (red butterfly wing), can reach 60–120 cm in height and is noted for leaves that develop rich burgundy coloration when grown in bright light, reverting to green under low-light conditions.

The genus has a broad distribution across tropical and subtropical Asia, spanning from southern China, Taiwan, and the Ryukyu Islands through Indochina, mainland Southeast Asia, the Malay Archipelago, and reaching into northern Australia. Several species have been introduced or naturalized beyond their native range, with populations recorded in Fiji and several Caribbean islands including Jamaica, Martinique, and St. Vincent.

Christia was formerly placed in part under the genera Hedysarum and Lourea before being consolidated. The genus name and its species are of interest to horticulturalists primarily due to C. vespertilionis, which is cultivated as an ornamental for its unusually shaped and colored foliage.