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19. Rhododendron subsect. Parishia (Tagg) Sleumer, Bot. Jahrb. Syst. 74: 548. 1949.

星毛杜鹃亚组 xing mao du juan ya zu

Fang Mingyuan (方明渊); David F. Chamberlain

Rhododendron subser. Parishia Tagg in J. B. Stevenson, Sp. Rhodod. 332. 1930 ["Parishii"].

Shrubs or small trees; young shoots stellate-tomentose, sometimes also glandular-setose. Leaf blade large, subleathery, elliptic to oblong obovate-elliptic; apex obtuse, rounded, rarely acuminate; abaxial surface glabrescent or thinly stellate-tomentose, especially on the midrib when young. Inflorescence 5–15-flowered. Calyx usually 2–5 mm (10–20 mm in R. schistocalyx); corolla tubular-campanulate, 5-lobed, fleshy, crimson, red or scarlet, occasionally yellow, mostly without flecks, with 5 conspicuous nectar pouches; stamens 10; ovary densely tomentose or glandular-hairy; style stellate-tomentose and glandular at base or to tip.

Eight species; China, India, Myanmar, Vietnam; seven species (five endemic) in China.

1 Calyx 10–20 mm, irregularly lobed; inflorescence rachis 5–8 mm, stellate-tomentose.   410 Rhododendron schistocalyx
+ Calyx not exceeding 5 mm; inflorescence rachis 5–30 mm.   (2)
2 (1) Shoots and petiole glandular-setose when young.   (3)
+ Shoots and petiole without glandular setae.   (5)
3 (2) Leaf blade obovate-elliptic or oblong-elliptic, 3.5–9(–10)cm wide, apex obtuse to rounded, abaxial surface stellate-tomentose when young; rachis ca. 30 mm.   406 Rhododendron kyawii
+ Leaf blade elliptic-lanceolate, 2–4 cm wide, apex acuminate or caudate, abaxial surface usually glabrous except for tomentose midrib; rachis 5–10 mm.   (4)
4 (3) Leaf apex caudate; lateral veins obscure, midrib hairs stellate; inflorescence 10–12-flowered.   411 Rhododendron urophyllum
+ Leaf apex not caudate; lateral veins ± prominent, midrib hairs folioliferous; inflorescence 6–10-flowered.   412 Rhododendron venator
5 (2) Pedicels glandular-hairy; leaves 4–11 cm; calyx ca. 1.5 mm, margin glandular-ciliate.   409 Rhododendron huidongense
+ Pedicels stellate-tomentose; leaves 8.5–20 cm; calyx 2–5 mm, margin glabrous.   (6)
6 (5) Corolla deep rose to scarlet; calyx 4–5 mm.   407 Rhododendron facetum
+ Corolla yellow; calyx 2–3 mm.   408 Rhododendron flavoflorum

Lower Taxa


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