2. Diapensia purpurea Diels, Repert. Spec. Nov. Regni Veg. 10: 419. 1912.
红花岩梅 hong hua yan mei
Diapensia bulleyana Forrest ex Diels; D. purpurea f. rosea W. E. Evans; D. purpurea f. albida W. E. Evans.
Shrublets 3–10 cm tall. Leaves crowded on stem; petioles 2–6 mm, semiamplexicaul, persistent; leaf blade spatulate-elliptic to oblong, 3–4(–7) × 1.5–2.5(–3.5) mm, adaxially very finely papillose and without stomates, base gradually narrowed and attenuate into petiole, margin entire and apically slightly revolute, apex rounded to ± obtuse. Flowers subsessile. Sepals spatulate to oblong, 5–6 × 1–3.5 mm, usually with 5 inconspicuous veins. Corolla pinkish red, occasionally white or yellow; tube tubular, 4.5–6 × 10–13 mm; lobes orbiculate, ca. 6–6.5 × 4–4.5 mm, apex acute. Staminodes 5, glabrous. Style 2–15.5 mm, shorter to longer than corolla tube; stigma slightly capitate to obscurely lobed. Capsule globular, ca. 2–3 mm in diam.; persistent calyx papery, green, lobes spatulate; elongated scape thick, 0.5–6 cm, usually with 1 or 2 spatulate bracts. Seeds broadly elliptic, ca. 0.7 × 0.5 mm, testa reticulate. Fl. May–Jun, fr. Jun–Sep.
Mountain summits, bare rock faces; 2600–4500 m. W Sichuan, SE Xizang, NW Yunnan [N Myanmar].