Commelina axillaris Linnaeus, Sp. Pl. 1: 42. 1753; Amischophacelus axillaris (Linnaeus) R. S. Rao & Kammathy.

Herbs annual; roots fibrous. Stems erect or creeping, branched, 30--40 cm. Leaves all cauline; leaf blade linear, 20--80 × 5--8 mm, abaxially glabrous or sparsely pubescent. Cincinni reduced, in axillary fascicles of 3--6 flowers; peduncle absent; bracts ca. 10 mm. Sepals free, linear-spatulate, 6--9 mm, abaxially hirsute. Petals blue, ca. 12 mm. Filaments blue lanate. Capsule oblong, trigonous, 4--5 mm, hispid at apex, with 6 horned projections. Seeds gray-black or gray-brown, pitted. Fl. spring, autumn.

Humid sandy places. W Hainan (Changjiang Xian), Hong Kong [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Sri Lanka, Thailand, Vietnam; Oceania].