Description from Flora of China
Cassiope dendrotricha Handel-Mazzetti; C. macrantha Handel-Mazzetti.
Shrubs 6–18(–46) cm tall. Stems initially decumbent, ultimately much branched, fastigiate, glandular and shortly pubescent. Leaves assurgent; leaf blade linear-oblong, 5–7 × 1–1.2 mm, boat-shaped, leathery, abaxially nitid or dull, deeply furrowed, furrow nearly reaching apex and divergent near base, densely puberulous within, adaxially strongly concave, glabrous, base 2-lobed, margin not membranous, inconspicuously denticulate, rigidly pubescent-barbellate, apex obtuse, apiculate. Flower nutant. Pedicel 0.9–1.8(–2.5) cm, densely crisped-tomentose, base with 4 fringed bracts. Calyx purple-red; lobes oblong or ovate, 2–3 mm, glabrous, margin membranous. Corolla white, campanulate, 6–7 mm, glabrous; lobes erect, oblong, 2–3 mm. Stamens 2–2.5 mm; filaments pilose; awns ca. 1.2 mm. Capsule ca. 2.5 mm in diam. Fl. Jun–Aug, fr. Jul–Aug.
Rhododendron scrub, alpine moorlands, meadows, rocks, rock crevices; 3600–4100 m. SW Sichuan, E Xizang, NW Yunnan [Myanmar].