清远耳草 qing yuan er cao

Oldenlandia assimilis (Tutcher) Chun.

Herbs or subshrubs, erect, branched, 30-40 cm tall; stems quadrangular, scabrous. Petiole ca. 3 mm; leaf blade drying papery, lanceolate, 5-9 × 1.5-2.5 cm, scabrous, base cuneate, apex long acuminate; secondary veins ca. 4 pairs, adaxially impressed; stipules broadly triangular, ca. 3 mm, usually 4-6-lobed or perhaps setose. Inflorescence axillary and terminal, in cymes arranged into panicles, usually shorter than leaves, 6-8-flowered; bracts small, narrow; pedicels 1-3 mm. Flowers pedicellate, with biology unknown. Calyx glabrous; lobes ovate, acute. Corolla white, outside glabrous, inside and on filaments densely bearded; lobes lanceolate, longer than tube, obtuse. Style exserted, bearded below middle. Fruit capsular, ellipsoid, ca. 3 mm including persistent calyx limb, septicidal then loculicidal through middle of septum; seeds numerous, black, angled. Fl. Apr-May.

● Broad-leaved forests, slopes in ravines. Guangdong (Conghua, Qingyuan).