Clethra acuminata, the mountain pepper bush, is a shrub native to the Appalachian Mountains of the southeastern United States. It has been reported from the states of Pennsylvania, West Virginia, Virginia, North Carolina, South Carolina, Georgia, Alabama and Tennessee, primarily from deciduous forests at elevations of 500–1,400 m (1,600–4,600 ft). Clethra acuminata is a native plant to the lower 48 states of the United States. It is an understory shrub found in the Appalachian region of the eastern United States. In the garden it prefers partial shade and loam and sand soil. In UK gardens it is hardy in most of the UK (RHS H5). Suggested uses include cottage and informal garden and low maintenance. It tolerates acid soils, moist but well-drained conditions and south-facing, north-facing, west-facing and east-facing aspects. Plant in well-drained soil in sun or partial shade.

Clethra acuminata, commonly known as pointed-leaved white alder, is a member of the Clethraceae family. This species is characterized by its distinctive bark and simple leaves, with small, fragrant, bell-shaped flowers that bloom in racemes or panicles.

https://en.wikipedia.org/wiki/Clethra_acuminata

Clethra acuminata

Pointed-leaved white alder | Clethra acuminata

Clethra alnifolia, the coastal sweetpepperbush or summer sweet, is a species of flowering plant in the genus Clethra of the family Clethraceae, native to eastern North America from southern Nova Scotia and Maine south to northern Florida, and west to eastern Texas. It is a deciduous shrub which grows in wetlands, bogs and woodland streams.

Clethra alnifolia, or coastal sweetpepperbush, is a hardy deciduous shrub with fragrant summer flowers, ideal for full sun in UK gardens.

https://en.wikipedia.org/wiki/Clethra_alnifolia

Clethra is a genus of flowering shrubs or small trees erected as a genus by Linnaeus in 1753.

Clethra alnifolia

Clethra alnifolia 'Paniculata' is a hardy deciduous shrub with fragrant summer flowers, perfect for cottage and informal gardens in full sun.

Clethra alnifolia 'Paniculata'

Ruby Spice Sweet Pepperbush is a hardy deciduous shrub with fragrant summer flowers, ideal for borders, hedges, and wildlife gardens in full sun.

Clethra alnifolia 'Ruby Spice'

Clethra arborea, commonly known as the lily-of-the-valley-tree, is a flowering plant in the genus Clethra. It is found in Macaronesia where it is native to Madeira, extinct in the Canary Islands, and considered an introduced species in the Azores. In Madeira its natural habitat is laurisilva forest. Grow it in partial shade and loam and sand soil. In UK gardens it is hardy in most of the UK (RHS H5). It works well for cottage and informal garden and low maintenance. It tolerates acid soils, moist but well-drained conditions and south-facing, north-facing, west-facing and east-facing aspects. Plant in well-drained soil in sun or partial shade.

Clethra arborea, commonly known as the lily-of-the-valley tree or tree white alder, is a member of the Clethraceae family. This species showcases simple leaves and distinctive bark, while its small, fragrant, bell-shaped flowers are typically arranged in racemes, adding an appealing aesthetic to any environment.

https://en.wikipedia.org/wiki/Clethra_arborea

Clethra arborea

Lily-of-the-valley tree | Clethra arborea

Clethra pringlei is a bushy, deciduous cultivar of the Clethra genus, which comprises trees and shrubs known for their simple leaves and small, fragrant white flowers arranged in racemes or panicles. This cultivar thrives in partial shade and prefers a sheltered position with fertile, well-drained, acidic soil such as loam or sand that remains moist. Hardy to UK zone H5, it is suitable for cottage and informal gardens and requires low maintenance. Interest is primarily in spring and summer when the plant displays its characteristic floral display.

Clethra pringlei is a bushy, deciduous shrub with fragrant white flowers in spring and summer, ideal for partial shade and low-maintenance cottage gardens.

Clethra pringlei

Clethra tomentosa 'Cottondale', known as woolly white alder 'Cottondale', is a bushy, deciduous cultivar of the Clethra genus. These shrubs are noted for their simple leaves and small, fragrant, white bell-shaped flowers arranged in racemes or panicles. 'Cottondale' thrives in partial shade with a sheltered aspect, preferring fertile, moist but well-drained acidic soils such as loam or sand. Hardy to UK zone H5, it is suitable for cottage and informal gardens and is low maintenance, flowering in spring and summer.

Woolly white alder 'Cottondale' thrives in partial shade, is hardy to H5, and suits low-maintenance cottage and informal gardens with spring and summer