美被杜鹃(原变种) mei bei du juan (yuan bian zhong)

Rhododendron calostrotum subsp. riparium (Kingdon Ward) Cullen; R. kingdonii Merrill; R. riparium Kingdon Ward (1930), not A. Wang & P. C. Tam (1978); R. rivulare Kingdon Ward (1929), not Handel-Mazzetti (1921).

Leaf blade ovate-elliptic or oblong-elliptic, 1.5–2.5 cm. Calyx 4–9 mm; corolla 1.5–2.5 cm.

Thickets or rocky slopes in high mountains, often dominant; 3400–4600 m. Xizang, Yunnan [India, Myanmar].