Family Code: THYMEL Genus Code: DIRCA Genus CN: leatherwood Genus Authority: L. Genus Summary: A genus of 4 species, shrubs, of North America (including Mexico). Our species is most closely related to D. mexicana G.L. Nesom & Mayfield (of the Sierra Madre Oriental, Tamaulipas, Mexico) and D. decipiens Floden (of e. MS, nw. AR, and sw. MO); the other species is D. occidentalis A. Gray of California (Schrader & Graves 2004; Floden, Mayfield, & Ferguson 2009). Genus References: Floden & Nevling in FNA (2015); Nevling (1962)=Z; Floden, Mayfield, & Ferguson (2009)=Y. Last Updated: 2019-11-29 Publish: 1