Callisia repens (Jacq.) Linn. Sp. Pl., ed. 2. 1: 62. 1762. Hapalanthus repens Jacquin, in Enumeratio Systematica Plantarum, quas in insulis Caribaeis 1, 12. 1760.
Herbs perennial. Stems prostrate, forming mats, much branched, rooting at nodes. Leaves distichous, gradually becoming smaller distally along flowering shoots; leaf blade ovate to lanceolate, 1--4 × 0.6--1.2 cm, glabrous except for scabrid margin and apex, base clasping, subcordate or obtuse, apex acuminate. Inflorescence of paired (sometimes solitary), sessile, dense cincinni in axils of distal leaves. Flowers unisexual or male. Sepals green, linear-oblong, 3--4 mm, hirsute along midvein, margin scarious. Petals white, lanceolate, 3--6 mm. Stamens 3; filaments long exserted; connectives broadly deltoid. Ovary oblong, subtrigonous, 2-loculed, apex pilose; ovules 2 per locule. Style filiform, long; stigma penicillate. Capsule oblong, ca. 1.5 mm, 2-valved. Seeds 2 per valve, brown, ca. 1 mm, rugose.
Distribution: Native of New world, naturalized on roofs of houses.
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