Rhododendron siderophyllum
Billeder af Rhododendron siderophyllum
Beskrivelse
R. siderophyllum (Triflora) Busk op til 1-7 m. Blade matte grågrønne, med rundet basis. Blomster hvide til rødviolette. Ofte med røde støvknapper. Kun lidt spejlsymetrisk (not so zygomorphic) blomst. Blomsterstilk er kun 5-15 mm så blomsterklasen er kompakt. Der findes varianter med længere blomsterstilk (26-29 mm, Muli, Finn Bertelsen). De fleste støvdragere ikke længere end kronen. Sorte spredte skæl på bladoverfladen. Skæl på undersiden overlappende til 2D, med bred rand, gule og senere brune. Vildtvoksende i C og S-Yunnan, Guizhou ved 840 – 2100 m. Ikke hårdfør i Danmark. Planten ofte fejlbestemt.
Hans Eiberg
● R. siderophyllum frø. Foto: Hans Eiberg
● R. siderophyllum #1734, frø. Foto: Hans Eiberg
Flora of China
RBGE herbarium. R. siderophyllum
10076 RBGE Herbarium; ioanthum
10080 RBGE Herbarium; jahandiezii
10077 RBGE Herbarium; leucandrum
10078 RBGE Herbarium; rubro-punctatum
10030 RBGE Herbarium; seguinii
10219 RBGE Herbarium; squarrosum
Flora of China
R. siderophyllum Franchet, J. Bot. (Morot). 12: 262. 1898.
R. ioanthum I. B. Balfour; R. jahandiezii H. Léveillé; R. leucandrum H. Léveillé; R. obscurum Franchet ex I. B. Balfour (1922); R. rubropunctatum H. Léveillé & Vaniot (1911), not Hayata (1913), nor T. L. Ming (1984).
Shrubs, 1–2(–4) m tall; young shoots brown, densely scaly. Petiole 5–15 mm, densely scaly; leaf blade elliptic or elliptic-lanceolate, 3–7(–11) × 1.2–3.5 cm; base cuneate or rounded; apex acuminate, acute or nearly obtuse; abaxial surface scales 0.5–2 × their own diameter apart, or contiguous small to mid-sized, all similar or slightly unequal, brown, concave; adaxial surface scales dense, concave, glabrous or rarely pubescent along midrib. Inflorescence terminal or subterminal, shortly racemose, 3–5-flowered; rachis 2–4 mm. Pedicel 0.3–1.3 cm, scaly; calyx rimlike or undulate and 5-lobed, densely scaly; corolla tubular funnelform-campanulate, white, pale red, pale purple or rosy red, inside with yellowish green, pale red or pinkish spots or without spots, 1.6–3 cm, outer surface not scaly or sparsely scaly on lobes; stamens unequal, long ones longer than corolla; filaments pubescent or nearly glabrous at base; ovary 5-locular, densely scaly; style longer than corolla, usually glabrous, rarely pubescent at base. Capsule cylindric, 11–16 mm. Fl. Mar–Jun.
Mixed forests, coniferous forests on slopes, thickets; (1200–) 1800–3000 m. Guizhou, Sichuan, Yunnan.