Rhododendron tritifolium
Billeder af Rhododendron tritifolium
Beskrivelse
R. alutaceum var. iodes / R. russotinctum var. tritifolium (Taliensia). Opretvoksende kugleformet kompakt busk. Bladene er dækket med et mørkebrunt indument på bladundersiden. Blomsten hvid med en rød ganeplet, samt røde pletter. Vildtvoksende i Yunnan, Mekong/Salween området. Har været betragtet som en form af R. alutaceum var. russotinctum (D. Chamberlain). Blade dufter honningagtigt.
Hans Eiberg
● R. tritifolium RF06 #316 frø. Foto: Hans Eiberg
Flora of China, alutaceum
R. alutaceum I. B. Balfour & W. W. Smith, Notes Roy. Bot. Gard. Edinburgh. 10: 81. 1917.
Shrubs, 1.5–4 m tall; young shoots and petioles densely woolly-tomentose and/or glandular; bud scales deciduous or ± persistent. Petiole 10–15 mm; leaf blade thickly leathery, oblong, broadly lanceolate to lanceolate or narrowly oblong, 5–14 × 1.5–3.5 cm; base obtuse or subrounded; margin revolute; apex acute or shortly acuminate; abaxial surface with indumentum 2-layered, upper layer thick, woolly or felted, pale brown, rufous, rust-red, sometimes ± detersile, hairs branched, lower layer gray-white and compacted; adaxial surface glabrous. Inflorescence racemose-umbellate, 10–15-flowered; rachis 10–18 mm. Pedicel 1.5–2 cm, sparsely floccose and short-glandular-hairy or eglandular; calyx lobes 5, ca. 1 mm, subrounded, sparsely ciliate outside, margin glandular-ciliate; corolla campanulate or funnel-campanulate, white to pink, with crimson spots and with purple red basal blotch, 3.5–4 cm, lobes 5; stamens 10, unequal, filaments densely white-puberulent; ovary ca. 6 mm, densely tomentose and glandular-hairy to glabrous or sparsely floccose-tomentose and eglandular; style glabrous. Capsule cylindric, 10–15 × ca. 4 mm. Fl. Jun–Jul, fr. Sep–Oct.
Coniferous forests, thickets, mountains, rocky slopes; 3200–4300 m. W Sichuan, SE Xizang, NW Yunnan.
Flora of China, russotinctum
R. alutaceum var. russotinctum (I. B. Balfour & Forrest) D. F. Chamberlain, Notes Roy. Bot. Gard. Edinburgh. 36: 119. 1978.
Rhododendron russotinctum I. B. Balfour & Forrest, Notes Roy. Bot. Gard. Edinburgh 11: 129. 1919; R. triplonaevium I. B. Balfour & Forrest; R. tritifolium I. B. Balfour & Forrest.
Young shoots densely glandular; bud scales ± persistent. Leaf blade 5–9.5 × 1.5–2.5 cm; abaxial surface rust-red, upper indumentum thick, loose, felted, ± deciduous. Ovary densely tomentose and shortly glandular-hairy. Fl. Jun–Jul, fr. Oct.
Coniferous forests, thickets, mountains; 3300–4200 m. SE Xizang, NW Yunnan.
Flora of China, iodes
R. alutaceum var. iodes (I. B. Balfour & Forrest) D. F. Chamberlain, Notes Roy. Bot. Gard. Edinburgh. 39: 350. 1982.
Rhododendron iodes I. B. Balfour & Forrest, Notes Roy. Bot. Gard. Edinburgh 13: 49. 1920.
Young shoots densely rusty brown-tomentose; bud scales deciduous. Leaf blade 6–10 × 1.5–2.5 cm; abaxial surface rufous, upper indumentum densely felted-tomentose, persistent. Ovary sparsely floccose-tomentose, eglandular. Fl. Jun–Jul, fr. Sep.
Rhododendron thickets, mountains; 3300–4300 m. SW Sichuan (Muli), SE Xizang, NW Yunnan.