on silty calcareous soils of flat bolson plain, essentially denuded and converted to scattered mesquite scrub. Thorns notably thick and stout, not acicular; pinna 1-3 pairs crowded with 20+ paired leaflets
low sub-shrub thicket on silty clay loam of grassy, perennial forb dominated plains around brushy hummocks and above tidal salt flats. With Distichlis spicta, Borrichia frutescens, Rayjacksonia phyllocephala and scattered Opuntia engelmannia
on silty calcareous soils of flat bolson plain, essentially denuded and converted to scattered mesquite scrub. Thorns notably thick and stout, not acicular; pinna 1-3 pairs crowded with 20+ paired leaflets
on silty calcareous soils of flat bolson plain, essentially denuded and converted to scattered mesquite scrub. Thorns notably thick and stout, not acicular; pinna 1-3 pairs crowded with 20+ paired leaflets