Rhododendron bhutanense
Billeder af Rhododendron bhutanense
Beskrivelse
R. bhutanense (Taliensia). Busk op til 3 m og bladene til 12,5 cm. Blomsterne er fra hvide til røde med en magenta blotch som kommer frem i april-maj. Vildtvoksende i Bhutan ved 4150 – 4570 m.
Hans Eiberg
● R. bhutanense ARS05 #758 frø. Foto: Hans Eiberg
● R. bhutanense RHS#4270 frø. Foto: Hans Eiberg
● R. bhutanense hos UBCBG. Foto: Hans Eiberg
D. G. LONG.NOTES RELATING TO THE FLORA OF BHUTAN: XIII. Ericaceae. Notes RBG Edinb. 45(2): 327-335 (1989)
R. bhutanense Long & Bowes Lyon, sp. nov. Type: Bhutan, Punakha district, Tang Chu, Ritang, 4270m, 7 vi 1937, ‘Shrub 4-6 feet. Buds bright pink. Corolla very pale pink, lobes deeper pink. Large magenta basal patch and spots. Ovary, style and filaments glabrous; ovary dark red. Calyx glabrous, very small, lobes rosy. Leaves upper surface dull green, glabrous; lower surface with coarse brown tomentum covering midrib. The highest growing Rhododendron, except the dwarfs, on open rocky hillside.’, Ludlow & Sherriff 3218 (holo. E; iso. BM, E).
Shrub 06-3m, branchlets stout, closely greyish or whitish floccose when young. Leaves coriaceous, elliptic or elliptic-obovate, 6-125 x 3- 5cm, acute or subacute, base subcordate sometimes narrowly so, dark green and glabrous above except on impressed midrib with greyish closely matted fioccose hairs towards leaf base, hairs sometimes extending to mid-leaf or beyond; lower leaf surface closely appressed brown tomentose with dense, radiate hairs, moderately soft to touch; petiole short, stout, 3-10mm, greyish floccose above, thinly brownish tomentose beneath.
Racemes subglobose, 6-9cm diameter, dense, 8-15(-22)-flowered. Peduncle conical, 1.5-2cm; pedicels slender, 8-13mm, glabrous or puberulous. Calyx minute, 5-lobed, c. 1mm, glabrous. Corolla campanulate, deep pink in bud, when open pale pink (rarely almost white) with a dark magenta basal blotch and red spots on upper side, 25-35cm long, 5-lobed; nectar pouches absent. Stamens 10; filaments glabrous throughout. Ovary ovoid, 4-5 X 3mm, glabrous; style glabrous; stigma capitate. Fruit cylindric, almost straight, c. 15 x 5mm, glabrous.