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Clethra barbinervis, photographed by an iNaturalist contributor
(c) harum.koh, some rights reserved (CC BY-SA), uploaded by harum.koh · CC BY-SA
#1377 most planted

Clethra barbinervis

Japanese clethra · also Japanese sweet shrub, White alder, Tree clethra

Deciduous
51
trees mapped
0.00%
of all named trees
3
cities
19 in
median trunk (49 cm, 27 measured)
11 yr
median age (35% have a planting date)

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Clethra barbinervis is an upright deciduous shrub or small tree native to East Asia. It features glossy, serrated dark green leaves that turn yellow and red in fall, and produces fragrant white flowers in late summer to autumn. Its peeling bark provides year-round interest, making it a low-maintenance ornamental plant that benefits from protection from harsh winter winds.

Where it grows

Trees in each city's inventory, with the share of that city's named trees this species accounts for.

  1. Tokyo · Japan
    33—3.3 in
  2. Boston · United States
    164.9 yr19 in
  3. Helsinki · Finland
    2—2.0 in

Traits

Foliage
Deciduous
Mature height
10–25 ft
Canopy spread
10–15 ft
Wildlife value
Moderate
Blooms
Aug, Sep, Oct, Nov

Trunk diameters across every city: median 19 in, mean 13 in, 90th percentile 19 in. Measured at breast height, as published by each inventory.

Native range

Terrestrial ecoregions where this species is native. Trees in the dataset mostly stand well outside it.

Temperate Broadleaf & Mixed Forests

  • Central Korean deciduous forests
  • Southern Korea evergreen forests

Other Clethra in the catalogue

3 of the top 2,000 species are in this genus.

Interested in talking trees? arborary.world@gmail.comTree data © the respective municipal publishers and © OpenStreetMap contributors (ODbL).