[3] The white,[2] pale blue,[1] or greenish[3] flowers are borne in clusters at the stem tips.

[1] The plant is probably a relict species, rare now that conditions have changed since it was more abundant.

Today it grows on limestone and gypsum substrates in Chihuahuan Desert scrub vegetation.

In New Mexico it is threatened by oil and gas development and the changes that have occurred on the land due to overgrazing, such as erosion and introduced species of plants.

In Texas, the plant grows on roadsides and it may be threatened by roadway maintenance.