Rhododendron aureum var. hypopitys
Rhododendron aureum var. hypopitys or R. hypopitys
R. aureum var. hypopitys i Mustila Aboretum, Finland. Foto: Jaakko Saarinen
R. aureum var. hypopitys i Mustila Aboretum, Finland. Foto: Jaakko Saarinen
R. aureum var. hypopitys i Norge hos OJL. Foto: Ole Jonny Larsen
R. aureum var. hypopitys i Norge hos OJL, bark. Foto: Ole Jonny Larsen
R. aureum var. hypopitys DnR24-008 seeds. Foto: Hans Eiberg
R. aureum var. hypopitys DnR24-008 seeds. Foto: Hans Eiberg
R. aureum var. hypopitys i Mustila Aboretum, Billede
R. aureum var. hypopitys / R. hypopitys (Pontica) (-25 C). R. aureum var. hypopitys har i modsætning til var. aureum
affaldende knopskæl og lancetformede blade.
"Evergreen strongly branched creeping shrub up to 2 m tall; annual growths are reddish-brown, thickened, up to 8 mm in diameter,
shortly pubescent, old branches with a grayish bark. Leafy buds are conical, pointed, 15 mm long, 6 mm in diameter. Leaves
(without petioles) 9-15 cm long and 2-5 (7) cm wide, broadly oval, dense, leathery, bright green above, bright below,
gradually narrowed to a wedge-shaped base, with edges flat or slightly wrapped on the lower side.
Flowers in umbellate short flaps. Flowers 4-6 cm long, rusty-felt pubescent.
The calyx is flat, 3-5 mm in diameter. Corolla about 3 cm long, 4.5 cm in diameter, widely bell-shaped, yellow, incised
to the middle into rounded lobes. Stamens 10, of unequal length (the upper ones are shorter), all are shorter than the
corolla, the threads in the lower part are hairy. Boxes 13-17 mm long, conical, cylindrical.
Distribution: Amgunsky (eastern part) and Ussuriysk floristic region. Mostly in coniferous forests, spruce-fir, less
often in larch forests. - Endem. - Described from the Northern Sikhote-Alin, the Tumnin River Basin, in the Largashi
River Valley, 1934. V. Sochava.
There are numerous transitions between it and Rh. aureum. Indeed, tall forms (up to 1 m) with falling scales are found
up to northern Okhotia (Luzhin Bay).
However, no typical Rh. hypopitys, there are no transitional forms either on Kamchatka, or on the Kuril Islands and
Sakhalin Island, where there are all conditions suitable for them. Thus, this species in Russia has a very specific
range, the border of which, however, is somewhat vague on the mainland.
Konstantin Cherezov
ARS
Kew's Herbarium
gbif Herbarium (3649×5130) (gbif.org)
R. aureum var. aureum / R. hypopitys. Frøplante fra Arboretets overskud (5-8 cm lange blade fra Aboretet, mellemform). Foto: Hans Eiberg
R. aureum var. aureum / R. hypopitys (5-8 cm lange blade fra Aboretet, mellemform) hos Ole Flindt. Foto: Hans Eiberg
R. aureum var. hypopitys DnR24-008 seeds. Foto: Hans Eiberg
R. aureum var. hypopitys DnR24-008 seeds. Foto: Hans Eiberg