Thamnosma texana (A.Gray) Torr.

This odd little rutacid is scattered at low elevations on limestone from central Arizona through western Texas.

Plant habit in the southern Robledo Mountains, Doña Ana County, New Mexico, 17 Mar 2012.

Flowers in the southern Robledo Mountains, 17 Mar 2012.

Side view of a flower in the southern Robledo Mountains, 17 Mar 2012.

A flower in the hills on the west side of the Guadalupe Mountains, Otero County, New Mexico, 26 Mar 2005.

Developing fruit in the hills on the west side of the Guadalupe Mountains, 26 Mar 2005..

Plant habit in the hills on the west side of the Guadalupe Mts., 26 Mar 2005.

An inflorescence in the hills on the west side of the Guadalupe Mts., 26 Mar 2005.

Plant habit near New Mexico Highway 51 between Engle and Elephant Butte, Sierra County, New Mexico, 24 Apr 2010.