Roettlera hamosa (R. Brown) Kuntze.

Annuals, not rhizomatous. Stems erect, 5-25(-36) cm, sparsely puberulent to glabrous. Stem leaves 1-3(-7), lowermost solitary, leaves toward apex opposite; petiole 2-4(-10) X 1-3 mm; leaf blade narrowly to broadly ovate, 1.5-13 X 1-11 cm, herbaceous, adaxially puberulent, eglandular, abaxially sparsely puberulent to glabrescent, base rounded to cordate, margin entire, apex acute to obtuse; lateral veins 6-16 on each side of midrib, slightly conspicuous. Cymes scorpioid, 1-5(-10)-flowered; peduncle adnate to petiole, puberulent; bracts absent. Pedicel 3-14 mm, spreading pubescent. Calyx 5-11 mm, 5-lobed to 5-sect from near base; tube 0.5-4 mm; segments unequal, linear to narrowly triangular, 4.5-7 X 1-1.5 mm, outside puberulent, inside glabrous, margin entire, apex attenuate. Corolla white, yellow at throat, often flushed lavender, 1-1.9 cm, outside sparsely puberulent adaxially, inside glabrous; tube nearly tubular, 7-15 X 3-5 mm; adaxial lip 1.2-2 mm; abaxial lip ca. 2.3 mm. Filaments 2-4 mm, glabrous; anthers fused by projections on connectives, 1-1.8 mm, bearded; staminodes 2, 0.8-1.5 mm. Pistil 1.1-1.4 cm, puberulent; ovary 3-6 mm. Stigma narrowly obtrapeziform, ca. 1 mm, deeply 2-lobed. Capsule erect, 1.4-4 cm. Fl. Jul-Oct, fr. Jul-Nov.

Shaded rocks in forests, cliffs, or streamside valleys; 300-1500 m. S and W Guangxi, S and SE Yunnan [India, Laos, Malaysia, Myanmar, Thailand, N Vietnam].