Rhododendron mucronatum G.Don

Species

Angiosperms > Ericales > Ericaceae > Rhododendron

Characteristics

Much branched, wide-spreading shrub, 0.9-1.8(-2.5-5) m; shoots in their first year, as well as petioles and pedicels densely clothed with spreading grey to grey-brown soft hairs, mixed with few to many loosely appressed or spreading, flattened, bristle-like hairs, and occasionally with glandular hairs. Leaves partly persistent, dimorphous, spring leaves deciduous, membranous, lanceolate to ovate-lanceolate, apex acute or obtuse and mucronulate, base cuneate, on both surfaces with appressed straight and soft grey to rufous hairs, 3-4.5 by 1-2.5 cm; summer leaves persistent, chartaceous, oblong-lanceolate to oblong-oblanceolate, apex obtuse to rounded and mucronate, base cuneate, recurved at margin, pubescent like the spring leaves and often glandular, 1-3.5 by 0.6-1.2 cm; petiole 2-6 mm. Floral winter buds ovoid, outer perulae with strigose hairs along the middle line, inner ones viscid. Inflorescence 1-3-flowered. Pedicels 5-20 mm. Calyx lobes lanceolate, often slightly erose or serrate, glandular-pubescent, c. 12 mm. Corolla wide-funnel-shaped, 3.5-5 cm long and wide, fragrant, pure white or white with a yellowish blotch on the upper corolla lobes in the cultivated forms (red or rose coloured in the native form), occasionally a few flowers rose or striped with rose on an odd branch also in cultivated plants, with oval or narrow-oval lobes. Stamens 10 (sometimes 8), ± as long as the corolla; filaments glabrous or subglabrous. Ovary densely setose, glandless; style glabrous, slightly exceeding the corolla. Capsule conic-ovoid, with appressed setose hairs, c. 1 cm long, shorter than the persistent calyx lobes.
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Shrubs, semievergreen, 1–2(–3) m tall; young shoots spreading; branches many, densely gray-brown villous, also with a few glandular hairs. Summer and winter leaves different. Petiole 2–4 mm, densely long-strigose, hairs flat, and shortly glandular-hairy; leaf blade papery, lanceolate to ovate-lanceolate or oblong-lanceolate, 2–6 × 0.5–1.8 cm; base cuneate; apex obtuse to rounded. Inflorescence 1–3-flowered. Pedicel to 1.5 cm, densely yellowish brown-villous, also glandular-hairy; calyx lobes 5, lanceolate, ca. 12 mm, densely glandular-pubescent; corolla broadly funnelform, deeply 5-lobed, white, occasionally pale red, without purple flecks, 3–4.5 cm, lobes elliptic-ovate, as long as tube, glabrous; stamens 10, unequal, filaments puberulent below; ovary ovoid, ca. 4 × 2 mm, 5-locular, densely coarsely appressed-glandular-setose; style very long-exserted, glabrous. Capsule conical ovoid, ca. 10 mm. Fl. Apr–May, fr. Jun–Jul.
A shrub that keeps its leaves most of the year. It grows 1-2 m tall. There are many spreading branches. They have a grey coating. Leaves in the summer and winter are different. The are oval or sword shaped and 2-6 cm long by 1-2 cm wide. The flowers are in groups of 1-3. They are funnel shaped with 5 lobes and white or pale red.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 1.0
Mature height (meter) 1.0 - 2.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a temperate and subtropical plant. It grows in well drained soil and open places. In Sichuan and Yunnan.
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Fl. Jan.-Dec.
Light 4-6
Soil humidity 2-7
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 6-9

Usage

Uses medicinal
Edible flowers
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from cuttings.
Mode cuttings
Germination duration (days) 50 - 90
Germination temperacture (C°) 12 - 15
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Rhododendron mucronatum unspecified picture

Distribution

Rhododendron mucronatum world distribution map, present in China, India, Japan, Portugal, Sao Tome and Principe, Taiwan, Province of China, and Viet Nam

Identifiers

LSID urn:lsid:ipni.org:names:332919-1
WFO ID wfo-0001229801
COL ID 796DH
BDTFX ID -
INPN ID 636192
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Rhododendron argyi Rhododendron ledifolium Rhododendron mucronatum Rhododendron rosmarinifolium