Guaiacum coulteri (Coulter's Guayacan)

Guaiacum coulteri, also known as Coulter's Guayacan, is a hard wood plant that belongs to the z9b hardiness zone. It is an evergreen shrub or small tree native to Baja California and Northwestern Mexico. The plant produces attractive bright blue flowers, and can reach a height of up to 30 feet with a spread of 20 feet.