Phlebotaenia cowellii, the violet tree, is a species of flowering plant in the family Polygalaceae, native to Puerto Rico. A small tree reaching , it is typically found in both seasonally dry forests and humid forests at elevations from 5 to 600 m (16 to 2,000 ft). Its fruits have asymmetrical winged fins. Found on limestone, its sporadic distribution and continuing encroachment on its forest habitat has led to it being assessed as Near Threatened.