Lindernia nummulariifolia (D. Don) Wettstein

Annuals, 1-15 cm tall. Roots fibrous. Stems erect, subquadrangular, sparsely spreading hairy on angles. Leaf blade broadly ovate to orbicular-ovate, 5-12 X 4-8 mm, abaxially glabrous or sparsely hairy only on midrib, base broadly cuneate to cordate, margin shallowly crenate to undulate or acuminate toothed, apex obtuse; veins parallel from base. Inflorescences terminal or axillary subumbels, few flowered. Central flowers sessile or short pedicelled, cleistogamous; other flowers on pedicels ca. 2 cm, sometimes sterile. Calyx ca. 3 mm, lobed to middle or 2/3 of length; lobes ovate to lanceolate-ovate. Corolla violet, rarely blue or white, ca. 7 mm; lower lip spreading flat, 3-lobed; upper lip ovate. Filaments of anterior stamens basally small appendaged. Capsule narrowly ellipsoid, ca. 2 X as long as persistent calyx, apex acuminate. Seeds brown. Fl. Jul-Sep, fr. Aug-Nov.

Gansu, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Xizang, Yunnan, Zhejiang [Kashmir, Myanmar, Nepal, Sikkim, Thailand, Vietnam].

Edge of rice fields, along streams, wet places; below 1800 m.

Vandellia nummulariifolia D. Don, Prodr. Fl. Nepal. 86. 1825; Lindernia sessiliflora (Bentham) Wettstein; Vandellia chinensis T. Yamazaki; V. sessiliflora Bentham.

nummulariifolia: with coin-like, almost circular leaves

Erect annual herb up to c. 14 cm high, branching from near the base. Leaves opposite, subsessile, broadly ovate to almost circular, 9-20 mm long, shortly hairy on margins and veins beneath; margin serrate-crenate. Flowers solitary in the upper leaf axils, Pedicels 3-14 mm long slender. Calyx 2.5-3.5 mm long; lobes 1-1.5 mm long unequal. Corolla blue to lilac with darker blue or violet tinge, c. 6 mm long; upper lip oblong, 2 mm long, entire; lower lip 3-lobed, 2.5 mm long. Capsule ovoid-cylindric, 4.5-6 mm long, shortly beaked.

Widespread in tropical Africa and Madagascar. Also in Asia from India, Sri Lanka, Nepal, Birma, China and Thailand.

宽叶母草（学名：Lindernia nummulariifolia），为玄参科母草属下的一个植物种。