Rhododendron subsect. Monantha in Flora of China @ efloras.org

4. Rhododendron subsect. Monantha Cullen, Notes Roy. Bot. Gard. Edinburgh. 36: 122. 1978.

黄绿杜鹃亚组 huang lü du juan ya zu

Fang Ruizheng (方瑞征 Fang Rhui-cheng); David F. Chamberlain

Shrubs, 0.3–3 m tall, sometimes epiphytic; young shoots scaly, hairs absent. Leaf blade leathery; abaxial surface scales large, flat, with wide margin, brown, often unequal; adaxial surface with scales only. Inflorescence terminal, subumbellate, 1–3-flowered. Calyx undeveloped, undulate, or 5-lobed, 0.5–4 mm; corolla tubular or tubular-campanulate, lobes not spreading, yellow, tinged with green when dry, rarely purple, outer surface scaly; stamens 10, longer than corolla; ovary 5-locular; style longer than corolla, glabrous or scaly below. Capsule oblong, 8–18 mm, densely scaly. Seed winged.

Four species: China, India, Myanmar; three species (one endemic) in China.

1 Inflorescence 1(or 2)-flowered; abaxial leaf surface densely brownish scaly, these ± their own diameter apart. 41 Rhododendron monanthum

+ Inflorescence 2- or 3-flowered; abaxial leaf surface pale brown scaly, these 0.5–3 × their own diameter apart. (2)

2 (1) Calyx 2.5–4 mm; lobes 5, oblong-ovate or nearly rounded; style scaly at the base. 42 Rhododendron flavantherum

+ Calyx ca. 0.5 mm, 5-toothed; style not scaly. 43 Rhododendron kasoense

Lower Taxa