A shrub is distinguished from a tree by its multiple stems and shorter height, usually under 6 m (20 ft) tall. Plants of many species may grow either into shrubs or trees, depending on their growing conditions. Small, low shrubs, generally less than 2 m (6.6 ft) tall, such as lavender, periwinkle and most small garden varieties of roses, are often termed subshrubs or bushes.
An area of cultivated shrubs in a park or garden is known as a shrubbery. When clipped as topiary, suitable species or varieties of shrubs develop dense foliage and many small leafy branches growing close together. Many shrubs respond well to renewal pruning, in which hard cutting back to a 'stool' results in long new stems known as "canes". Other shrubs respond better to selective pruning to reveal their structure and character.
Hamamelis×intermedia (hybrid witch hazel) is a species of flowering plant in the family Hamamelidaceae. It is a hybrid of garden origin between H. japonica and H. mollis. Its latin name refers to its intermediate appearance between those two species.
It is a deciduousshrub growing to 4 m (13 ft) tall and wide, with zig-zagging stems and alternate, simple leaves 15 cm (6 in) long, which turn yellow in autumn. The yellow, orange or red flowers with twisted petals appear on bare stems in midwinter through early spring.
Numerous cultivars have been developed, many of them prized as garden subjects. The following have gained the Royal Horticultural Society's Award of Garden Merit:-