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11. Rhododendron subsect. Pontica (Tagg) Sleumer, Bot. Jahrb. Syst. 74: 546. 1949.

长序杜鹃亚组 chang xu du juan ya zu

Hu Linzhen (胡琳贞 Hu Ling-cheng); David F. Chamberlain

Rhododendron ser. Pontica Tagg in J. B. Stevenson, Sp. Rhodod. 567. 1930 ["Ponticum"].

Shrubs, sometimes dwarf, rarely small trees; young shoots often glabrous. Leaf blade both surfaces glabrous at maturity, sometimes with persistent hair-bases or tomentose abaxially. Inflorescence terminal, lax or dense, 5–10-flowered; rachis 3–6 cm; pedicels elongating in fruit to 6 cm; calyx 5-lobed; corolla campanulate or funnelform-campanulate, lobes as long as corolla-tube, 5(–7)-lobed, white or yellow, with darker flecks; stamens 10; filaments pubescent at base; ovary tomentose, glandular or glabrous; style glabrous or glandular in lower half.

About 12 species: Asia, Europe, North America; two species (one endemic) in China.

1 Bud-scales deciduous; abaxial leaf surface with punctate hair-bases; corolla white; ovary glandular.   313 Rhododendron hyperythrum
+ Bud-scales persistent; abaxial leaf surface without punctate hair-bases; corolla yellow; ovary tomentose.   314 Rhododendron aureum

Lower Taxa


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