照山白 Rhododendron micranthum

  • Scientific Name: Rhododendron micranthum Turcz.
  • Ref: Bull. Soc. Imp. Naturalistes Moscou 21(1):586. 1848
  • Synonyms: Azalea micrantha (Turcz.) Kuntze; Rhododendron pritzelianum Diels; R. rosthornii Diels
  • English Common Name: Manchurian rhododendron
  • Chinese Common Name: 照山白 zhàoshān∙bái
  • Japanese Common Name: ホザキツツジ [穂咲き躑躅] hozakitsutsuji, コゴメツツジ [小米躑躅] kogometsutsuji
  • Family: Ericaceae
  • Genus: Rhododendron
  • Distribution: Thickets, scrub, slopes, dry gorges, cliffs, rocks; 1000–3000 m. N China, also Henan, Hubei, Hunan, Sichuan [Korea].
  • Photo: Heilongjiang
Shrubs, evergreen, up to 2.5 m tall; branchlets slender, scaly, puberulous. Petiole 3–8 mm, scaly; leaf blade almost leathery, oblanceolate, oblong-elliptic, to lanceolate, (1.5–)3–4(–6) × (0.4–)9–12(–2.5) cm; base narrowly cuneate; apex obtuse or acute, mucronate; abaxial surface scales contiguous or ca. 0.5 × their own diameter apart, brownish, broadly rimmed; adaxial surface dark green, shiny, usually sparsely scaly. Inflorescence racemose, 10–28-flowered; rachis 10–26 mm. Pedicel 0.8–2 cm, densely scaly; calyx lobes 1–3 mm, linear or triangular-lanceolate, scaly, margin ciliate; corolla campanulate, white, (0.4–) 0.5–0.8(–1) cm, tube slightly shorter than lobes; outer surface scaly; inner surface glabrous; stamens 10, nearly as long as corolla; filaments glabrous; ovary densely scaly; style nearly as long as stamens, glabrous. Capsule cylindric, (4–)5–6(–8) mm, scaly. Fl. May–Jun, fr. Aug–Nov. (Flora of China)

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