岩观音草 yan guan yin cao

Herbs to 1 m tall, erect, glabrous. Petiole 1.5-4.5 cm; leaf blade narrowly oblong, lanceolate, or rarely ovate, 4-9(-20) × 3-5 cm, both surfaces glabrous, secondary veins 6-8 on each side of midvein, base rounded, margin entire, apex acute. Cymes terminal or axillary; peduncle 1.5-1.7 cm; outer involucral bracteoles various, broadly ovate to linear-lanceolate, 1-1.8 × 0.2-1 cm, pinnately veined, base rounded to truncate, margin entire, apex obtuse; inner cymule bracteoles linear, 3-4 mm. Calyx ca. 5 mm; lobes linear. Corolla pink, 4.5-6 cm, outside glabrous; lip in lower position elliptic, apex emarginate; lip in upper position oblong, 3-lobed. Filaments pubescent; anther thecae linear. Ovary glabrous; style glabrous. Capsule ca. 2 cm, shiny, glabrous. Seeds ca. 3 × 2.6 mm. Fl. Oct-Dec, fr. Dec-Feb.

Wet shady cliffs. Hainan [India, Sri Lanka].