Monolophus coenobialis Hance, J. Bot. 8: 75. 1870; Kaempferia coenobialis (Hance) C. H. Wright; Roscoea flava Merrill.

Plants slender, tufted. Pseudostems 15--30 cm × ca. 3 mm. Leaves 5--9, sessile or shortly petiolate, basal ones smaller than apical; leaf blade lanceolate, 5--14 × 1--2 cm, thin, glabrous, base acute, apex long caudate-acuminate. Bracts 2 or 3, 3--5 cm, 1- or 2-flowered. Calyx 1--1.5 cm, persistent. Corolla yellow; tube ca. 3 cm; lobes lanceolate, ca. 1 cm. Lateral staminodes elliptic, ca. 1.2 cm. Labellum yellow, broadly ovate, ca. 1.5 × 2 cm. Filament very short; anther ca. 3 mm; connective crest oblong, ca. 4 mm. Capsule ovoid-oblong, ca. 1 cm. Seeds ellipsoid-ovoid. Fl. Apr--Jul, fr. Aug. 2 n = 24*.

Medicinal.

* Forest floors. Guangdong, Guangxi.