针子草 zhen zi cao

Rhaphidospora vagabunda (Benoist) C. Y. Wu ex C. C. Hu.

Shrubs to 1.3 m tall. Stems terete, zigzag, glabrous. Petiole 7-12 mm; leaf blade oblong-lanceolate, 6-14 × 2-5 cm, glabrous or sometimes pilose along midvein, base obliquely cuneate, margin entire or slightly undulate, apex acute to falcate. Cymes axillary, ca. 2 cm; peduncle 4-6 mm, pubescent; bracts subulate, 1-2 mm, pilose; bracteoles 2-5 mm, pilose. Calyx ca. 3.5 mm, outside pubescent; lobes 5, oblong-lanceolate. Corolla white with blue lines, 1-1.1 cm, outside pubescent; tube as long as limb; lower lip 3-lobed; upper lip triangular, apex emarginate. Staminal filaments ca. 4 mm, glabrous; anther thecae superposed, lower one spurred at base. Ovary pubescent at tip; style basal portion hirsute. Capsule not seen.

Forests, thickets, streamsides; 500-800 m. Yunnan [Cambodia, Vietnam].