R. siderophyllum
● R. siderophyllum seeds. Foto: Hans Eiberg
● R. siderophyllum #1734, seeds. Foto: Hans Eiberg
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
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
Rhododendron siderophyllum Franchet, J. Bot. (Morot). 12: 262. 1898. Rhododendron 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. Rhododendron seguinii H. Léveillé (Repert. Spec. Nov. Regni Veg. 13: 148. 1914) was described from Guizhou. The identity of the type specimen, J. Cavalerie 1254, is in doubt as it totally lacks leaves. However, there is indirect evidence that it is related to, or synonymous with, R. siderophyllum (see Cullen, Notes Roy. Bot. Gard. Edinburgh 39: 65, 67. 1980).