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13. Rhododendron subsect. Micrantha (Hutchinson) Sleumer, Bot. Jahrb. Syst. 74: 533. 1949.

照山白亚组 zhao shan bai ya zu

Yang Hanbi (杨汉碧 Yang Han-pi); David F. Chamberlain

Rhododendron ser. Micrantha Hutchinson in J. B. Stevenson, Sp. Rhodod. 500. 1930 ["Micranthum"].

Shrubs, 2–3 m tall; young shoots scaly, puberulous. Leaf blade usually lanceolate; abaxial surface scales contiguous or nearly so, broadly rimmed, brownish; adaxial surface sparsely scaly. Inflorescence terminal, racemose, 10–28-flowered; rachis 6–26 mm; pedicels scaly, sometimes puberulous. Flowers very small. Calyx 1–3 mm, 5-lobed, scaly, ciliate on margin; corolla campanulate or tubular-campanulate, 0.5–1.2 cm, sometimes deeply lobed, white, or yellow; outer surface scaly; stamens 10, about as long as corolla; ovary 5-locular; style straight, glabrous. Capsule cylindric, 4–11 mm, scaly. Seed prominently winged and finned.

Three species: China, Korea; three species (two endemic) in China.

1 Corolla yellow.   136 Rhododendron liaoxigense
+ Corolla white.   (2)
2 (1) Leaf blade (1.5–)3–5 cm, abaxial surface glabrous; corolla 4–8 mm.   135 Rhododendron micranthum
+ Leaf blade 9–12.5 cm, abaxial surface inconspicuously arachnoid-puberulous; corolla ca. 12 mm.   134 Rhododendron brevicaudatum

Lower Taxa


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