Texas Ebony

Peanut, soybean, lima bean

Texas Ebony ( _Ebenopsis ebano_) is a slow-growing evergreen tree native to the coastal plain of southern Texas and northeastern Mexico, now widely planted as a landscape shade tree throughout Phoenix, Tucson, and other low-desert Arizona communities. Hardy to 10–20°F and thriving in reflected heat and poor soils, it has become a common fixture in xeriscape gardens, patio plantings, and commercial landscapes across the Valley of the Sun and Sonoran Desert communities.

From an allergy standpoint, Texas Ebony warrants attention primarily because of its exceptionally long bloom season. Fragrant, cream-colored flower spikes appear from May through October and under heat or drought stress the tree can bloom almost continuously, a pattern documented in a Tucson home landscape where a resident specifically developed an allergy to the flowers and pollen, and the tree resumed blooming shortly after chemical treatment to suppress flowering. Because Texas Ebony is insect-pollinated, its pollen is not wind-dispersed in high concentrations the way olive or mulberry are. However, sensitized individuals, particularly those already reactive to mesquite or other Fabaceae trees, can experience cumulative irritation during the extended bloom period, especially in enclosed patios or small yards where the tree is planted close to outdoor living areas.

As a member of the legume family Fabaceae, Texas Ebony shares a cross-reactivity profile with mesquite, Catclaw Acacia, and Sweet Acacia. No allergens have been formally characterized for _Ebenopsis ebano_ specifically, but the shared profilin proteins common to Fabaceae link it to legume food cross-reactivity with peanut, soybean, and lima bean in sensitized patients. For allergy-sensitive homeowners seeking dense evergreen shade in Arizona, Desert Ironwood and Desert Willow offer comparable visual impact with significantly less allergy risk.