Rhododendron bachii H. Lév.

The characters used to separate Rhododendron bachii from R. ovatum are fairly trivial, especially those relating to the calyx indumentum. Furthermore, there is continuous variation in these characters, suggesting that R. bachii should be treated as a synonym of R. ovatum.

Shrubs, 2–3(–8) m tall; young shoots gray-brown pubescent and sparsely glandular-setose. Petiole ca. 5 mm, pubescent and glandular-hairy; leaf blade subleathery, ovate or ovate-elliptic, 3–5.5 × 1.5–2.5 cm; base broadly cuneate or subrounded; margin finely undulate-crenate; both surfaces glabrous except for the pubescent midrib abaxially. Inflorescence subapical, 1-flowered. Pedicel 1.2–1.6 cm, pubescent and glandular-hairy; calyx deeply lobed; lobes ovate or obovate, 3–5 × 3–4 mm, puberulent abaxially or glandular-hairy, margin with dense short glandular hairs, apex obtuse and fluted; corolla rotate, purple or purplish, with dark red flecks on upper three lobes, 1.8–2.1 cm; lobes broadly obovate, ca. 1.4 cm wide, pubescent near the base within; stamens 5, unequal, 2–2.8 cm, as long as or slightly shorter than corolla; filaments flat, puberulent below the middle; ovary densely shortly glandular-hairy; style 2.5–3.2 cm, slightly curved, exserted, longer than stamens, glabrous. Capsule ovoid, ca. 7 × 6 mm, densely shortly glandular-hairy. Fl. Apr–May, fr. Jun–Oct.

Anhui, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Zhejiang.

Open forests; 600–1600 m.

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

Rhododendron bachii là một loài thực vật có hoa trong họ Thạch nam. Loài này được H. Lév. miêu tả khoa học đầu tiên năm 1913.

腺萼马银花（学名：Rhododendron bachii）为杜鹃花科杜鹃属下的一个种。