Polygala cowellii (Britton) S.F. Blake

Polygala cowellii (Britton) S.F. Blake. Phlebotaenia cowellii, the violet tree, is a species of flowering plant in the family Polygalaceae, native to Puerto Rico. A small tree reaching 20 m (66 ft), it is typically found in both seasonally dry forests and humid forests at elevations from 5 to 600 m. 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.