11.1. Salpianthus macrodontus Standley (1911: 393) .

Type: ― MEXICO. Sinaloa, on cliffs along the sea near the signal station at Mazatlán, 31 March 1910, Rose et al. 13752 (holotype:― US barcode 00103081 [image!] image available at http://n 2t.net/ark:/65665/3afcce6aa-7644-44d6-bc39-a32837d66892) .

Distribution in Mexico: ―Endemic to the country, in Sinaloa and Sonora states (Hernández-Ledesma 2021). In Sonora it is distributed in Pacific Lowlands and Sonoran biogeographic provinces (Fig. 4D), and has been collected in Alamos, Empalme and Guaymas municipalities, in tropical deciduous forest and subtropical scrub, at 20–800 m a.s.l.