Habit: Polygala grandiflora grows as a branching pubescent perennial herb to 50 cm in height. The lanceolate leaves are arranged alternately, to 5 cm in length, an acuminate leaf apex and entire margin.
The complete, perfect, zygomorphic flowers are arranged terminally and axillary in racemes. The calyx has 5 green, fused at the base sepals, the upper with glands. The corolla has 5 pinkish purple and green petals with the lower 2 forming a keel with a yellow tip. There are 8 stamens located within the keel. The ovary is superior with 2 locules. The fruit is a capsule at maturity that is oval in outline.
Habitat: Polygala grandiflora grows in open areas in Dry Broadleaf Evergreen Formation – Shrubland (coppice- scrubland), Pine Woodlands and in Human Altered environments (fields and yards).
Distribution: Polygala grandiflora occurs on the central and northern island groupings within the Lucayan Archipelago, Cuba, Hispaniola and the southern United States.
Medicinal/Cultural/Economic usage: Polygala grandiflora is not known to be used medicinally in the Lucayan Archipelago