乌面马（学名：Plumbago zeylanica）为蓝雪科蓝雪属下的一个种。

Plumbago zeylanica, commonly known as Ceylon leadwort, doctorbush or wild leadwort, is a species of plumbago with a pantropical distribution. Carl Linnaeus described the paleotropical P. zeylanica and neotropical P. scandens as separate species, but they are currently considered synonymous. Ceylon Leadwort is a herbaceous plant with glabrous stems that are climbing, prostrate, or erect. The leaves are petiolate or sessile and have ovate, lance-elliptic, or spatulate to oblanceolate blades that measure 5-9 × 2.5–4 cm in length. Bases are attenuate while apexes are acute, acuminate, or obtuse. Inflorescences are 3–15 cm in length and have glandular, viscid rachises. Bracts are lanceolate and 3-7 × 1–2 mm long. The heterostylous flowers have white corollas 17–33 mm in diameter and tubes 12.5–28 mm in length. Capsules are 7.5–8 mm long and contain are reddish brown to dark brown seeds.