Handb. Fl. Ceylon 6: 214. 1931.
Annuals. Stems erect to decumbent, not matted, usually rooting at proximal nodes, 3–17 cm. Leaves cauline, thin; petiole absent; blade obovate, oblanceolate, or elliptic, distal sometimes linear, (2–) 10–25 × (0.4–) 3.5–9 mm, pinnately veined to 1-nerved, not leathery, margins shallowly serrate to subentire; distal well developed or much reduced. Pedicels 3–15 mm, 1/2–3 times subtending leaves. Flowers: sepals 5–6 mm, connate to 1/4 lengths; corolla white, lavender, or pink, abaxial lobes sometimes with purple markings, tube 5.5–8 mm, adaxial lip equal to abaxial; stamens 2; staminodes without appendage and distal segment. Capsules narrowly lanceoloid, 8–14 × 1.2–3.8 mm. Seeds irregularly oblong, ovoid, or rhombic, not ribbed. 2n = 36 (India).
Phenology: Flowering Jun–Sep.
Habitat: Moist to wet roadsides, disturbed areas, pine flatwoods.
Elevation: 0–50 m.
Introduced; La., Asia, Australia, also in Mexico, South America (Venezuela)
Lindernia antipoda has only recently been introduced in the Americas; it was first collected in 1979 (Allen, Vincent & Erbe 9259, LAF) from Livingston Parish, Louisiana (K. A. Vincent 1981). It has subsequently been documented from Mexico and Venezuela.
"thin" is not a number.