干地杜根藤 gan di du gen teng

Calophanoides xerophila (W. W. Smith) C. Y. Wu ex C. C. Hu.

Herbs to 10 cm tall. Stems basally semi-woody, slender and flexuous, yellow pilose. Petiole 1-3 mm, pilose; leaf blade lanceolate to oblanceolate, 0.8-1.5 × 0.3-0.5 cm, papery, both surfaces slightly pilose along veins, secondary veins ca. 3 on each side of midvein, base cuneate, margin ciliate and entire or apically 2 or 3 repandly toothed, apex acute to obtuse. Spikes axillary, ca. 1 cm, 1-3-flowered; bracts leaflike, broadly obovate to subcircular, 3-5 mm; bracteoles linear, ca. 2 mm. Calyx green, ca. 5 mm, outside slightly pilose to subglabrous, 5-lobed almost to base; lobes linear, apex acuminate. Corolla white, 7-8 mm, outside sparsely pilose; lower lip 3-lobed; upper lip emarginate. Staminal filaments ca. 4 mm, pilose; anther thecae superposed, lower one spurred at base. Ovary glabrous; style ca. 6 mm, subglabrous. Capsule ca. 5 mm, glabrous. Seeds ovate in outline, ca. 1 × 1 mm, tuberculate.

● Thickets on dry slopes. Yunnan.