Annuals to 50 cm tall. Stems erect, 4-angled, internodes subglabrous, nodes densely hirsute. Leaves sessile; leaf blade linear-lanceolate, 5-9 × 0.7-1.2 cm, papery, both surfaces scabrous-hirsute, secondary veins 5-7 on each side of midvein, base broadly attenuate, margins subentire, apex obtuse. Flowers several clustered in leaf axils, sessile; bracteoles ovate to lanceolate, ca. 1.5 × 0.4-0.6 cm, abaxially glabrous, adaxially strigose, apex acuminate. Calyx ca. 1.5 cm, 5-lobed to middle; lobes linear, subequal, apex acuminate. Corolla ca. 2.5 cm; lower lip ± spreading, 3-lobed; lobes of lower lip oblong, 2.5-3 × ca. 2 mm, subequal, inside barbate, apex obtuse; upper lip erect, ca. 1 cm, 2-lobed. Stamens 4; anther thecae ca. 3 mm. Ovary ca. 2.5 mm, glabrous; style glabrous. Fl. Aug-Oct, fr. Oct-Jan.
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