Coulteria lewisiae (Leguminosae: Caesalpinioideae) a new species for Infiernillo region, Mexico

A new Coulteria species from the seasonally dry forest of Infiernillo region, Mexico is described and illustrated.  Coulteria lewisiae, has young leaves sericeous that changes to adpresse tomentose when mature, flowers of 2 cm length (notable in the genus), and a glabrous fruit.