Oldenlandia herbacea (L.) Roxb.

Oldenlandia herbacea (L.) DC. Prodr. 4: 425. 1830
Hedyotis herbacea L. Sp. PI. 102. 1753.
Hedyotis commutata Schultes, in R. & S. Syst. Veg. Mant. 3: 134. 1827.
Erect or procumbent annual, glabrous throughout, the stems usually much branched, 2-10 dm. long, slender, subangulate, the internodes equaling or longer than the leaves; stipules 2-3 mm. long, bicuspidate or tricuspidate ; leaves sessile, spreading or reflexed, the blades usually linear, sometimes linear-lanceolate, 1.5-7 cm. long, 1-8 mm. wide, longattenuate at the apex or rarely acute or acutish, acute to attenuate at the base, thin, pale beneath, the lateral veins usually obsolete ; flowers axillary, solitary or clustered, the pedicels filiform, 8-25 mm. long, usually reflexed in fruit; hypanthium about 1.5 mm. long, the calyx-lobes about as long, lanceolate, acuminate, distant in fruit, sometimes ciliolate; corolla salverform, white, about as long as the calyx-lobes; capsule depressed-globose, 2.5-3 mm. long, 3-4.5 mm. wide, shallowly bisulcate, smooth: seeds minute, pale-brown, subangulate, finely reticulate.
Type locality: Ceylon.
Distribution: Honduras to Panama; West Indies; also in South America, Africa, India, and the Rast Indies.