EVERGREEN

Plant Encyclopedia

Rhododendron benhallii ("Tsuriganetsutsuji")

Japanese name: ツリガネツツジ (釣鐘躑躅)
Scientific name: Rhododendron benhallii

[Overview]
A deciduous shrub about 1–2 m tall, growing at forest edges and similar places in the mountains.
Young branches are hairless.
The leaves are simple and alternate, but are often clustered in groups of 4–6 at the branch tips.
The leaves are 2–5 cm long and 1–2.5 cm wide, elliptic to oblong, slightly whitish on the underside, with long hairs on the leaf margin and on the veins of the underside.
The leaf stalk is 1–3 mm long and hairless.
A short raceme emerges at the branch tip, bearing 1–10 flowers in a bundle-like cluster.
The flowers are yellowish green tinged with reddish purple at the tip, tubular, with a flower stalk of 10–20 mm, and bloom facing downward.
There are 10 stamens.
The ovary is densely covered with glandular hairs.
The flower stalk has glandular hairs, and their length differs by region.
The edge of the calyx is irregularly uneven and bears thick glandular hairs.
It is not distinctly 5-lobed like the related Urajiro-yoraku.
The fruit is a spherical capsule 4–5 mm long that splits into 5.

[Cultivation]
Propagate from seed.
The rate of rooting is poor, but propagation by cuttings is also possible.
Grow it in a well-drained, moisture-retentive spot in sun to partial shade out of the afternoon sun.
It prefers acidic soil.

Details

Names
Japanese: ツリガネツツジ(釣鐘躑躅)、ウスギヨウラク(薄黄瓔珞)、サイリンヨウラク、キバナツリガネツツジ(黄花釣鐘躑躅)、アキツリガネツツジ
Life form
Shrub
Evergreen / deciduous
Deciduous
Leaf type
Broadleaf
Habit
Terrestrial
Planting (or sowing) season
February, March, April, October, November
Flowering season
April, May, June
Distribution or origin
Japan (Honshu: Yamanashi and Ishikawa westward; Shikoku: Tokushima)
Growth form
Branching
Height
1000–2000 mm
Leaf shape
Simple leaf (unlobed)
Leaf arrangement
Alternate
Leaf margin
Entire
Inflorescence
Raceme
Flower color
Purple, Green
Leaf color
Green
Availability of seeds and plants
Low
Form sold
Seedlings
Propagation
Seed
Sun exposure
Full sun, Partial shade
Water needs
Moderate
Soil needs
Required
Soil acidity
Acidic
Suitable uses
Bonsai, Potted plant
Designated plants
Endemic to Japan
Japan Flower Trade Code
23667

Translated from our Japanese encyclopedia. If anything differs, the Japanese page is correct.

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