Texas Olive Trees. Cordia boissieri, Borage Family: ( Boraginaceae ) , Texas Olive. Also Called: Anacahuita, Wild Olive, Mexican Olive, White Cordia, White Geiger, and Texas Wild Olive. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Cordia boissieri is a species of flowering shrub or small tree in the borage family, Boraginaceae. Its native range extends from southern Texas in the United States south to central Mexico. A deciduous, large shrub or small tree, 10 to 25 feet tall and wide. It has single gray-green leaves up to 5 inches long and 2 inches wide. Will take full sun or reflected heat. Quick Notes: Height: Up to about 10 - 25 feet tall, spread 10 to 25 feet. Trunk: 3 to 8 inches in diameter. An attractive rough trunk; multi stemmed deciduous tree, sometimes single stemmed. Bark: Flowers: Funnel-shaped, single white flowers with a yellow throat, 1 1/2 - 2 1/2 inches in diameter. Blooming Time: Late March - April. Sometimes in the fall. Seeds: Olive shaped, but unedible, yellow-green fruit, 1 inch long. With one to four large seeds. Leaves: Single, obovate, gray-green leaves up to 5 inches long and 2 inches wide. Covered with short hairs giving them a rough texture. Found: Native to Texas & northern Mexico in Nuevo Le�n, & Tamaulipas. State flower of Nuevo Le�n in Mexico. The USDA claims it is native of the USA (TX). Elevation: Native from 0 to 5,699 feet. Hardiness: Said to survive into Zone 6b. USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) USDA Zone 10a: to -1.1 �C (30 �F) USDA Zone 10b: to 1.7 �C (35 �F) USDA Zone 11: above 4.5 �C (40 �F) Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) Sun Exposure: Full Sun Habitat: Dry, well-drained soils; drought tolerant. Miscellaneous: Photos Taken April 22, 2006. At Boyce Thompson Arboretum near Superior, Arizona. A low water use landscaping plant in the Phoenix and Tucson areas. Water slightly in Phoenix. Honey bees and bumble bees are attracted to this plant.