Phyllanthopsis phyllanthoides

About

Phyllanthopsis phyllanthoides, commonly called buckbrush or maidenbush, is a flowering plant in the family Phyllanthaceae. It is native to Mexico and the United States. Its natural habitat is on limestone or dolomite rock outcrops, particularly in seepy shelves along rivers, but also in upland areas such as glades and bluffs.

Summary from Wikipedia