20. Rhododendron subsect. Barbata (Tagg) Sleumer, Bot. Jahrb. Syst. 74: 544. 1949.
硬刺杜鹃亚组 ying ci du juan ya zu
Fang Mingyuan (方明渊); David F. Chamberlain
Rhododendron subser. Barbata Tagg in J. B. Stevenson, Sp. Rhodod. 126. 1930 ["Barbatum"].
Shrubs or small trees; bark smooth, peeling; young shoots usually stoutly setose, or glandular-hairy (setae sometimes absent in R. barbatum). Leaf blade elliptic, oblong to broadly obovate, glabrous or with abaxial surface coarsely setose to glandular-hairy at maturity, sometimes with thin continuous or discontinuous layer of dendroid hairs. Inflorescence dense, 10–20-flowered; rachis 5–7(–10)mm. Calyx small to large, usually colored, to 15 mm, lobes rounded; corolla tubular-campanulate, 5-lobed, fleshy, deep red to rarely rose, with nectar pouches at base; stamens (8–)10; filaments glabrous; ovary glabrous to densely glandular-hairy, with or without brown branched hairs, and glands; style glabrous.
Five species: Bhutan, China, India, Nepal, Myanmar, Sikkim; four species (one endemic) in China.