Vandellia elata Benth.

Lindernia elata var. chinensis (Bonati) Handel-Mazzetti has been reported from China, but no specimens have been seen by the authors.

Annuals, erect, to 40 cm tall, usually much branched, basally woody with age. Stems conspicuously angled, densely hirsute. Petiole to 1.4 cm, narrowly winged; leaf blade triangular-ovate, 1.2-2 X 1.2-2 cm, patently hirsute, base cuneate to truncate and often decurrent, margin coarsely acute serrate, apex acute. Flowers numerous, mostly in axillary racemes forming panicles; bracts narrowly lanceolate, hairy. Pedicel 2-7 mm, ascending, hairy. Calyx to 4 mm in fruit, lobed to base; lobes linear-lanceolate, patently hairy. Corolla purple, purple-red, or blue, ca. 4 mm; tube ca. 1 mm, inflated at middle; lower lip 3-lobed; upper lip emarginate. Filaments of anterior stamens with a clavate appendage. Capsule ellipsoid, shorter than persistent calyx. Seeds ribbed. Fl. Jul-Oct, fr. Sep-Nov.

Rice fields, grassland, sandy mountain slopes; low elevations. Fujian, Guangdong, Guangxi, Yunnan [Cambodia, Indonesia (Kalimantan), Malaysia, Thailand, Vietnam].

Vandellia elata Bentham, Scroph. Ind. 36. 1835; Lindernia urticifolia (Hance) Bonati; Vandellia urticifolia Hance.