Rhododendron sinonuttallii I. B. Balf & Forrest

Shrubs, 1–3(–5) m tall; branches stout, densely scaly. Petiole stout, not grooved, 15–30 mm, densely scaly; leaf blade oblong-elliptic, 14–26 × 4.5–12 cm, narrowing toward both ends; apex acute; abaxial surface dirty white, scales dense, small, unequal, brownish red; adaxial surface dark green, scales sparse or absent; veins conspicuously wrinkled, raised abaxially, concave adaxially. Inflorescence terminal, subumbellate, 3–6-flowered; rachis enlarged, 15–20 mm; flower bud scales falling off early. Flowers fragrant. Pedicel stout, ca. 2.5 cm, densely scaly, pubescent; calyx pale red, deeply 5-lobed; lobes 20–28 mm, oblong, persistent in fruit, densely scaly, gray-pubescent; corolla broadly campanulate, pale yellowish white, lower tube yellow, 1–1.4 cm, outer surface densely scaly; lobes rounded, shorter than tube; stamens 10, as long as corolla tube, filaments lower half white pubescent, anthers ca. 12 mm; ovary 5-locular, densely scaly; style stout, longer than stamens, basal part densely scaly; stigma discoid, 6–9 mm in diam. Capsule cylindric, lobes keeled, 50–70 × ca. 24 mm. Fl. May–Jun.

SE Xizang, NW Yunnan.

Pinus forests, cliffs in forests, thickets, epiphytic or terrestrial; 1200–2800 m.

Rhododendron sinonuttallii adalah spesies tumbuhan yang tergolong ke dalam famili Ericaceae. Spesies ini juga merupakan bagian dari ordo Ericales. Spesies Rhododendron sinonuttallii sendiri merupakan bagian dari genus Rhododendron.

Rhododendron sinonuttallii là một loài thực vật có hoa trong họ Thạch nam. Loài này được Balf. f. & Forrest miêu tả khoa học đầu tiên năm 1920.