Rhododendron hylaeum
Billeder af Rhododendron hylaeum
Beskrivelse
R. hylaeum (Thomsonia). Grenen er glat sølvfarvede grå-brun til lilla-rød. Planten blomster i maj med kødfulde kronblade, der er rosa med mørkere pletter. Blomsterstlk 1,5-2 cm glat, calyx 5-8 mm (R. faucium‘s blomsterstilk er 0,5-1 cm og kirtelhåret, calyx 3 mm). Fundet i åbne blandede skove på ved 2000 til 3500 m i Burma og Kina.
Hans Eiberg
● R. hylaeum JN #12135 frø. Foto: Hans Eiberg
Flora of China
R. hylaeum I. B. Balfour & Farrer, Notes Roy. Bot. Gard. Edinburgh. 13: 265. 1922.
Shrubs or small trees, 6–12 m tall; trunk massive, bark slate gray to purplish, smooth when mature; older branches smooth and glabrous; young shoots glandular. Petiole slender, 15–20 mm, glandular-hairy when young, glabrescent; leaf blade leathery, oblong-elliptic to obovate-elliptic, 8–15 × 2.5–3.5 cm; base cuneate to broadly cuneate; apex obtuse, apiculate; abaxial surface glaucous, glabrous; adaxial surface green, glabrous; midrib flat or grooved adaxially; lateral veins 15–18-paired, not conpicuous. Inflorescence racemose-umbellate, 10–12-flowered; rachis 20(–45) mm, glabrous. Pedicel stout, ca. 1 cm, glabrous or glandular; calyx greenish, cupular, fleshy; lobes 5, 3–5 mm, undulate, often deflexed; corolla tubular-campanulate, fleshy, pale rose or pink, with dark flecks, 4–4.5 cm, basal nectar pouches 5; lobes 5, ca. 1.5 × 2.5 cm, emarginate; stamens 10, unequal, 2–3.5 cm, filaments glabrous; ovary cylindric, ca. 6 × 4 mm, glabrous; style glabrous. Capsule 15–20 × 7–8 mm, glaucous, glabrous, calyx usually persistent. Fl. May–Jun, fr. Aug.
Forests, mountain slopes; 2800–3600 m. SE Xizang, NW Yunnan [NE Myanmar].