Pentalinon luteum (L.) B. F. Hansen and Wunderlin
Former Name: Urechites lutea (L.) Britt.
Common Names: Wild Alamanda, Wild Unction, Catesby’s Vine
Habit: Pentalinon luteum grows as a shrubby vine climbing over other vegetation and structures. The leaves are arranged oppositely, ovate and up to 15 cm in length. The leaf tip is apiculate and the margins are entire. Stems and leaves have a milky sap
The flowers are arranged in cymes. The calyx has 5 unfused green, elongate sepals. The corolla has 5 bright yellow petals that are fused at the base forming a tube up to 5 cm long. In the interior of the tube are slight reddish marks. At the end of the tube there are 5 lobes forming a pinwheel with the edges overlapping to one side. There are 5 stamens that are fused to the inside of the corolla tube. The ovary is superior, forming follicles in pairs, each up 20 cm in length. The seeds are brownish and have tufts of hairs (pappus) that assist in aerial dispersal.
Habitat: Pentalinon luteum grows in in Dry Broadleaf Evergreen Formation Forests/Shrublands (coppice), Dunes, Rocky Shores, and Pine Woodlands.
Distribution in Bahamas/Globally: Pentalinon luteum occurs on all islands in the Bahamian Archipelago, the entire Caribbean region, and Florida.
Medicinal/Cultural/Economic usage: Pentalinon luteum is used medicinally in the Bahamas treat dermatological problems (cuts and sores). It is used in the horticultural industry. The milky sap is highly toxic and no portion of the plant should be ingested!