Monographs Details: Acacia angustissima var. texensis (Isely) Torr. & A.Gray
Authority: Isley, Duane. 1973. Leguminosae of the United States: I. Subfamily. Mimosoideae. Mem. New York Bot. Gard. 25 (1): 1-152.
Discussion:Acacia texensis T. & G. Acaciella texensis (T. & G.) Britt. & Rose Acacia cuspidata auct. pro parte Acacia angustissima var. cuspidata auct. pro parte S Texas to se Arizona. Rocky hillsides, canyons, outcrops, limestone to igneous or sandy soils; with pinyon-juniper and juniper-oak to creosote bush and grasses. ?4500-6300 ft. May-Sept. The var. texensis is of discontinuous dispersion in geographic and floristic regions between vars. hirta and suffrutescens. Although distinctive in typical form, it is extensively clinal (or intergradient?) with var. hirta to the east (see Map 1) and somewhat so with suffrutescens to the west. It spawns var. chisosiana in the harsh climes of the mountains in the Big Bend area of Texas. It cannot be maintained at the specific level.