Elizabeth M. Riess's The Garden of Chaparral...

This also has the descriptive sub - title: Plants of the Lower Rio Grande Valley.

"86. Anacua (Ehretia elliptica) A twenty - five to thirty - foot tree, with strong limbs, round top, no thorns...

"Anacua from Anaqua a group of trees with simple leaves and usually edible fruit,growing near water (anacua,of water); classed as the Ehretia, named for G.L. Ehret, German botanist - illustrator."

Yessir! Yours truly has a lot of fine hot - summer memories going back now a half century, sitting under the shade of just such a tree way down southeast of here, a half mile or so outside of Rancho Campo del Gato, reading J. Frank Dobie's The Long Horns...