Mariosousa heterophylla

Mariosousa heterophylla, also called the palo blanco tree (which is also applied to Ipomoea arborescens), palo liso, guinola, and Willard acacia, is a normally evergreen mimosoid plant in the genus Mariosousa native to Mexico. The Spanish common name translates into 'white stick', defining its peeling white bark. A compound called willardiine, that acts as an agonist in glutamate receptors, can be isolated from M. heterophylla.