Rhododendron barbatum G.Don

Species

Angiosperms > Ericales > Ericaceae > Rhododendron

Characteristics

Large shrubs or small trees, 1.5–8 m tall; old branches grayish brown, glabrous; young branches setose, rarely glabrous. Petiole 12–22 mm, sparsely blackish brown glandular-setose or glabrous; leaf blade leathery, oblong to obovate-oblong, 9.8–18 × 3.5–5.8 cm; base truncate to rounded; margin reflexed; apex acuminate; abaxial surface whitish green, midrib and base setose, other parts slightly hairy when young; adaxial surface green; midrib raised abaxially, impressed adaxially; lateral veins 17–21-paired. Inflorescence densely umbellate, 10–20-flowered; rachis ca. 5 mm, glabrous. Pedicel 0.5–1.3 cm, glabrous; calyx green flushed red, cupular; lobes 5, 7–15 mm, broadly ovate or obovate-oblong, glabrous or with base hairy; margin erose; corolla tubular-campanulate, fleshy, deep red to blood-red, 3.1–3.6 × 3–3.6 cm, with 5 deep blackish red nectar pouches at base, glabrous; lobes 5, ± rounded, ca. 1.8 × 1.6–1.8 cm, apex deeply emarginate; stamens 10, unequal, 1.3–2.1 cm, filaments white, glabrous, anthers subelliptic, purplish black, 1.6–2 mm; ovary cone-shaped, ca. 5 mm, densely short-glandular-hairy; style ca. 1.6 cm, glabrous; stigma small, reddish, ca. 1.8 mm wide. Capsule cylindric, ribs obvious, slightly curved, 20–24 mm, with vestigial glandular hairs; calyx persistent; style persistent. Fl. May–Jun, fr. Aug–Sep.
More
A large evergreen shrub. It can be a small tree. It grows 6 m high and spreads 6 m wide. The bark is smooth and dark red-brown. It peels off. The young shoots have long stiff bristles. The leaves are dark green and glossy. They are oblong and 20 cm long. They are dull green underneath. The flowers are bright red. They are fleshy and 8 cm long. They are in compact rounded groups. There can be 10-20 in a group.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 3.75 - 4.25
Mature height (meter) 2.75 - 8.0
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 c3

Environment

It is a temperate plant. It grows between 2500-3500 m altitude in Uttar Pradesh in India. It suits hardiness zones 7-9. In Rhodo garden.
Light 4-9
Soil humidity -
Soil texture -
Soil acidity 2-4
Soil nutriment -
Hardiness (USDA) 8-10

Usage

The flowers are eaten raw in salad. They are also ground and used to make a sauce and for cold drinks. These have a slightly acid sweet taste. CAUTION: The flowers contain a toxic substance andromedotoxin.
Uses environmental use gene source material medicinal
Edible flowers
Therapeutic use Piscicide (unspecified), Central nervous system depressants (unspecified), Emetics (unspecified), Fishes, poisonous (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings, graftings or seedlings.
Mode cuttings graftings seedlings
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 barbatum unspecified picture

Distribution

Rhododendron barbatum world distribution map, present in Bhutan, China, India, and Nepal

Identifiers

LSID urn:lsid:ipni.org:names:332003-1
WFO ID wfo-0001229605
COL ID 4SFGD
BDTFX ID 56051
INPN ID 117686
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rhododendron barbatum Rhododendron lancifolium