
Clethra barbinervis
Japanese clethra · also Japanese sweet shrub, White alder, Tree clethra
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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.
- 330.01%—3.3 in
- 160.01%4.9 yr19 in
- 20.00%—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.