Salpianthus, Pl. Aequinoct. 1(6): 154. 1807 sec. Bittrich & Kühn (1993)
- Type: Salpianthus arenarius
The genus includes shrubs with alternate leaves, a four- to five-lobed tubular petaloid perianth with straight glandular hairs, three to four long exserted stamens and a linear style (Bittrich & Kühn 1993). Three species are recognized following this concept: S. aequalis Standl., S. arenarius, and S. macrodontus Standl., all of them with restricted distributions in Mexico. Salpianthus was assumed to be monophyletic by Douglas & Manos (2007), however, only S. arenarius was included in their study. Further information under Boldoa.