Amorpha apiculata

About

Amorpha apiculata is a species of papilionate leguminous shrub known commonly as the Baja California false-indigo. It is a very rare narrow endemic only found in the Sierra de San Pedro Mártir and its western foothills. It is characterized by a white vexillum, a smooth, hairless fruit and spine-like glands. It is closely related to Amorpha californica.

Summary from Wikipedia