Rhododendron simsii Planch.

Rhododendron (fr)

Species

Angiosperms > Ericales > Ericaceae > Rhododendron

Characteristics

A much-branched shrub, usually up to 1.5 m, rarely attaining 2.5 m; shoots densely clothed with appressed, flattened, shining brown hairs. Leaves persistent or partly so, and dimorphous in the wild plant, always persistent in specimens cultivated in the tropics and less distinctly dimorphous there; spring-leaves (or early leaves) chartaceous, elliptic, sometimes ovate or oblong-elliptic, 1.8-5 by 0.8-1.8 cm, apex acute or somewhat obtuse, base ± cuneate, sparingly strigose above, more densely so beneath at least on midrib and veins; summer-leaves (or later leaves) obovate to oblanceolate, 0.8-3.6 by 0.4-1.2 cm, more coriaceous; petiole densely strigose, 2-6 mm. Floral winter buds ovoid, not viscid, c. 4 cm long or less, with several perulae, these densely strigose along the median and ciliate. Inflorescences 2-6-flowered. Pedicels densely strigose, 5-10 mm. Calyx lobes ovate to lanceolate, strigose and ciliate, 2-6 mm persistent. Corolla broad-funnel-shaped, 3.5-5 cm long and wide, rose-red to bright or dark red, spotted, lobes broad-ovate. Stamens (8-9-)10, ± as long as the corolla; filaments pubescent below the middle; anthers purple. Ovary strigose; style exceeding the corolla, glabrous. Capsule ovoid, c. 8 mm long, setose.
More
Shrubs, 2(–5) m tall; branches many and fine, densely shiny brown appressed-setose, setae flat. Summer and winter leaves different. Petiole 2–6 mm. Leaf blade ovate, elliptic-ovate or obovate to oblanceolate, 1.5–5 × 0.5–3 cm; base cuneate or broadly cuneate; margin slightly revolute, finely toothed; apex shortly acuminate. Inflorescence 2–3(–6)-flowered. Pedicel ca. 0.8 cm, densely shiny brown appressed-setose; calyx deeply lobed; lobes triangular-long-ovate, ca. 5 mm, coarsely appressed-hairy, margin ciliate; corolla broadly funnelform, rose, bright to dark red, or white to rose-pink, with dark red flecks on upper lobes, 3.5–4 × 1.5–2 cm, lobes obovate, 2.5–3 cm; stamens 10, ca. as long as corolla, filaments pubescent below; ovary ovoid, 10-locular, densely shiny brown-strigose; style exserted, glabrous. Capsule ovoid, up to 10 mm, densely strigose, calyx persistent. Fl. Apr–May, fr. Jun–Aug.
A shrub. It grows about 2 m tall. The summer and winter leaves are different. The leaves are oval and 2-5 cm long by 1-3 cm wide. The base is wedge shaped and the edges are rolled. There are fine teeth along the edge. The flowers are in groups of 2-3. They are funnel shaped and red, pink or with dark red flecks.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 1.5 - 2.5
Mature height (meter) 1.5 - 2.25
Root system -
Rooting depth (meter) -
Root diameter (meter) 0.3
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate to tropical plant. in China it grows in pine forests between 500-2,700 m above sea level. In Sichuan and Yunnan.
Light 4-6
Soil humidity 3-7
Soil texture 3-4
Soil acidity 2-4
Soil nutriment -
Hardiness (USDA) 7-10

Usage

The flowers are cooked and eaten as a vegetable.
Uses environmental use gene source medicinal
Edible flowers
Therapeutic use -
Human toxicity strong toxic (leaf), strong toxic (fruit)
Animal toxicity strong toxic (leaf), strong toxic (fruit)

Cultivation

Plants can be grown from seeds.
Mode cuttings graftings seedlings
Germination duration (days) 50 - 90
Germination temperacture (C°) 12 - 15
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -18
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Rhododendron simsii habit picture by Daniel Barthelemy (cc-by-nc)
Rhododendron simsii habit picture by Daniel Barthelemy (cc-by-nc)

Flower

Rhododendron simsii flower picture by Liam Liu (cc-by-sa)
Rhododendron simsii flower picture by Liam Liu (cc-by-sa)

Distribution

Rhododendron simsii world distribution map, present in Bolivia (Plurinational State of), Brazil, China, Colombia, Guatemala, Honduras, India, Lao People's Democratic Republic, Mexico, Myanmar, Nicaragua, Korea (Democratic People's Republic of), Thailand, Taiwan, Province of China, and Viet Nam

Identifiers

LSID urn:lsid:ipni.org:names:333359-1
WFO ID wfo-0000405453
COL ID 4SGVC
BDTFX ID 56042
INPN ID 117693
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Azalea simsii Rhododendron viburnifolium Rhododendron calleryi Rhododendron bicolor Rhododendron petilum Rhododendron bellum Azalea prolifera Azalea indica var. simsii Rhododendron indicum var. simsii Rhododendron indicum var. formosanum Rhododendron indicum var. puniceum Rhododendron simsii var. simsii Azalea indica var. simsii Rhododendron indicum var. ignescens Rhododendron simsii