Rhododendron wardii f. croceum
Billeder af Rhododendron wardii f. croceum
Beskrivelse
R. wardii f. croceum (Thomsonia) (-15 °C). Er så nært beslægtet med R. wardii, at det i de talrige overgangsformer ikke er muligt at skelne imellem dem. Denne form har smallere blade og ovariet har længere stilkede kirtelhår.
Hans Eiberg
From the mountain near the Weixi County, sea level 3400m Dennis He
RBGE Herbarium; R. wardii
RBGE Herbarium; astrocalyx har smallere calyxflige og mindre blomster og blade.
RBGE Herbarium; croceum har smallere blade
RBGE Herbarium; gloeoblastum
RBGE Herbarium; litiense
RBGE Herbarium; oresterum
RBGE Herbarium; prasinocalyx
Trees and Shrubs Online; R. wardii W.W. Sm.
Shrub or small tree, 0.6–8 m. Leaves 6–11 × 2.3–6 cm, often glaucous when young, base cordate, glabrous. Flowers 5–15, in a lax to dense truss, white to sulphur yellow, buds often strongly tinged pink, with or without a basal blotch, open-campanulate (saucer-shaped), nectar pouches lacking, 25–40 mm; ovary and style stalked-glandular. Flowering May-June. Royal Horticultural Society (1997).
Distribution China SE Tibet, NW Yunnan, SW Sichuan
Habitat 3,000–4,300 m
RHS Hardiness Rating H5
Conservation status Least concern (LC)
Taxonomic note R. wardii hybridizes in the wild with R. selense (see under R. × erythrocalyx) and with R. vernicosum. Where its range overlaps with R. campylocarpum (in S Tibet) the two species apparently intergrade, probably due to local hybridization. These two are sometimes confused but R. wardii can always be distinguished by its glandular style. Royal Horticultural Society (1997).
var. wardii
Synonyms
R. astrocalyx Balf.f. & Forrest
R. litiense Balf.f. & Forrest
Flowers clear yellow.
Forms with relatively narrow leaves that are more glaucous than the type, from a restricted zone around the Li-ti-ping in W Yunnan, have been referred to R. litiense. This taxon is not maintained as it merges with the type form that has broader leaves. There are no significant differences in the flower characters.
RHS Gardening; R. wardii astrocalyx
Synonyms:
R. wardii astrocalyx
R. croceum
Family: Ericaceae
Native to GB / Ireland: No
Genus: Rhododendron
Genus description:
Rhododendron can be evergreen or deciduous shrubs or trees, with simple leaves, sometimes with a dense colourful indumentum of hairs on the lower side, and funnel-shaped, bell-shaped or tubular flowers that may be solitary or in short racemes
Name status: Correct