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9. Rhododendron subsect. Glischra (Tagg) D. F. Chamberlain, Notes Roy. Bot. Gard. Edinburgh. 36: 116. 1978.

粘毛杜鹃亚组 nian mao du juan ya zu

Fang Mingyuan (方明渊); David F. Chamberlain

Rhododendron subser. Glischra Tagg in J. B. Stevenson, Sp. Rhodod. 135. 1930 ["Glischrum"].

Dwarf shrubs or small trees, bark rough; young shoots densely glandular-setose and long-glandular-hairy; bud scales persistent or deciduous. Leaf blade herbaceous to leathery, oblong, ovate or elliptic to lanceolate; abaxial surface with stipitate-glands or bristles; adaxial surface glabrous or with persistent bristles, even when mature. Inflorescence lax, 6–14-flowered; rachis 5–15 mm; calyx large, 5–15 mm, lobes ± rounded, lingulate; corolla campanulate to funnel-campanulate, 5-lobed, white flushed pink to pink, usually with a purple basal blotch and flecks, lacking nectar pouches; stamens 10; ovary densely glandular-hairy to glandular-setose; style glabrous or glandular or tomentose only at base.

Six species; China, India, Myanmar; six species (three endemic) in China.

1 Branchlets with persistent bud scales; leaf blade abaxially thickly white and brown tomentose and sparsely glandular.   291 Rhododendron crinigerum
+ Branchlets without persistent bud scales; leaf blade abaxially not thickly tomentose.   (2)
2 (1) Corolla campanulate.   (3)
+ Corolla funnel-campanulate.   (4)
3 (2) Corolla pink, with purple basal blotch inside, 3.5–4 cm; leaf blade 14–22 cm.   286 Rhododendron glischrum
+ Corolla white flushed rose, with or without purple flecks inside at base, ca. 5 cm; leaf blade 9–12. cm   287 Rhododendron habrotrichum
4 (2) Pedicels densely tomentose; calyx lobes unequal; leaf blade oblong to obovate, abaxial surface glabrescent.   290 Rhododendron x diphrocalyx
+ Pedicels densely glandular-setose; calyx lobes well-developed, regular; leaf blade ovate, elliptic, lanceolate or oblong-lanceolate to oblanceolate, abaxial surface hairy at least on veins.   (5)
5 (4) Leaf blade ovate, lanceolate or elliptic, abaxial surface setulose and tomentose.   288 Rhododendron adenosum
+ Leaf blade oblong-lanceolate to oblanceolate, abaxial surface with vesicular hairs on the veins.   289 Rhododendron vesiculiferum

Lower Taxa


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