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A bush is a small- to medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. They are distinguished from trees by their multiple stems and shorter height, less than 6 m-10 m (20 ft–33 ft) tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed subshrubs.
Shrubs are perennial woody plants, and therefore have persistent woody stems above ground (compare with herbaceous plants).Usually shrubs are distinguished from trees by their height and multiple stems. Some shrubs are deciduous (e.g. hawthorn) and others evergreen (e.g. holly). Ancient Greek philosopher Theophrastus divided the plant world into trees, shrubs and herbs.
Some definitions state that a shrub is less than 6 m and tree is over 6 m. Others use 10 m as the cut off point.Many species of tree may not reach this mature height because of less than ideal growing conditions, and resemble a shrub sized plant. However such species have the potential to grow taller under the ideal growing conditions for that plant.
Small, low shrubs, generally less than 2 m (6.6 ft) tall, such as lavender, periwinkle and most small garden varieties of rose, are often termed subshrubs.
Most definitions characterize shrubs as possessing multiple stems with no main trunk. [ clarification needed ]This is because the stems have branched below ground level. There are exceptions to this, with some shrubs having main trunks, but these tend to be very short and divide into multiple stems close to ground level. Many trees can grow in multiple stemmed forms also, such as oak or ash.
An area of cultivated shrubs in a park or a garden is known as a shrubbery. [ clarification needed ] Other shrubs respond better to selective pruning to reveal their structure and character.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".
Shrubs in common garden practice are generally considered broad-leaved plants, though some smaller conifers such as mountain pine and common juniper are also shrubby in structure. Species that grow into a shrubby habit may be either deciduous or evergreen.
In botany and ecology, a shrub is more specifically used to describe the particular physical structural or plant life-form of woody plants which are less than 8 metres (26 ft) high and usually have many stems arising at or near the base.[ clarification needed ] For example, a descriptive system widely adopted in Australia is based on structural characteristics based on life-form, plus the height and amount of foliage cover of the tallest layer or dominant species.
For shrubs 2–8 metres (6.6–26.2 ft) high the following structural forms are categorized:
For shrubs less than 2 metres (6.6 ft) high the following structural forms are categorized:
Those marked with * can also develop into tree form.
Ornamental plants are plants that are grown for decorative purposes in gardens and landscape design projects, as houseplants, cut flowers and specimen display. The cultivation of ornamental plants is called floriculture, which forms a major branch of horticulture.
Pruning is a horticultural and silvicultural practice involving the selective removal of certain parts of a plant, such as branches, buds, or roots. Reasons to prune plants include deadwood removal, shaping, improving or sustaining health, reducing risk from falling branches, preparing nursery specimens for transplanting, and both harvesting and increasing the yield or quality of flowers and fruits.
A subshrub or dwarf shrub is a short woody plant. Prostrate shrub is a related term. "Subshrub" is often used interchangeably with "bush".
Dasiphora fruticosa is a species of hardy deciduous flowering shrub in the family Rosaceae, native to the cool temperate and subarctic regions of the northern hemisphere, often growing at high altitudes in mountains. Dasiphora fruticosa is a disputed name, and the plant is still widely referenced in the horticultural literature under its synonym Potentilla fruticosa. Common names include shrubby cinquefoil, golden hardhack, bush cinquefoil, shrubby five-finger, tundra rose, and widdy.
Pachysandra is a genus of five species of evergreen perennials or subshrubs, belonging to the boxwood family Buxaceae. The species are native to eastern Asia and southeast North America, some reaching a height of 20–45 cm (7.9–17.7 in), with only weakly woody stems. The leaves are alternate, leathery, with a coarsely toothed margin, and are typically 5–10 cm (2.0–3.9 in) long. The small uni-sexual blooms are greenish-white and produced in late spring or early summer.
Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity. It may be the mature vegetation type in a particular region and remain stable over time, or a transitional community that occurs temporarily as the result of a disturbance, such as fire. A stable state may be maintained by regular natural disturbance such as fire or browsing. Shrubland may be unsuitable for human habitation because of the danger of fire. The term was coined in 1903.
Garrigue or phrygana is a type of low, soft-leaved scrubland ecoregion and plant community in the Mediterranean forests, woodlands, and scrub biome.
In botany, ramification is the divergence of the stem and limbs of a plant into smaller ones, i.e. trunk into branches, branches into increasingly smaller branches, etc. Gardeners stimulate the process of ramification through pruning, thereby making trees, shrubs and other plants bushier and denser.
Habit is equivalent to habitus in some applications in biology; the term refers variously to aspects of behaviour or structure, as follows:
A low and spreading shrub with dense growth habit, reaching 12-18in. high and 5-10ft. Across. Foliage consists of dark green leaves, 1-2in. long with toothed margins; showy flower heads of purple and white occur from summer through fall and intermittently year around.
Eupatorium amabile is a shrubby plant in the family Asteraceae native China and Taiwan.
Rhus copallinum, the winged sumac, shining sumac, dwarf sumac or flameleaf sumac, is a species of flowering plant in the cashew family (Anacardiaceae) that is native to eastern North America. It is a deciduous tree growing to 3.5–5.5 metres (11–18 ft) tall and an equal spread with a rounded crown. A 5-year-old sapling will stand about 2.5 metres (8.2 ft).
Salvia gesneriflora is a herbaceous perennial or subshrub native to mountainous provinces of the Sierra Madre Oriental in Mexico, growing at 7,500–10,000 ft elevation. It was named for Gesneria-like flower. The genus Gesneria is named in honor of 15th-century Swiss botanist Conrad Gessner. The long tubular flowers of this salvia resemble Gesneria flowers. It is a popular ornamental plant.
Buddleja alternifolia, known as alternate-leaved butterfly-bush, is a species of flowering plant in the figwort family, which is endemic to Gansu, China. A substantial deciduous shrub growing to 4 metres (13 ft) tall and wide, it bears grey-green leaves and graceful pendent racemes of scented lilac flowers in summer.
Olearia viscidula, commonly known as the sticky daisy bush or wallaby weed, is a shrub or subshrub species in the family Asteraceae native to eastern Australia.
Olearia tomentosa, commonly known as the toothed- or downy daisy bush, is a shrub or subshrub species in the family Asteraceae.
Lasiopetalum macrophyllum, commonly known as shrubby velvet bush, is a common shrub of the mallow family found in eastern Australia. Growing up to a metre tall, much of the plant is covered in rusty hairs. It is found in forest, woodland and heathland.
Zanthoxylum parvum, known as Shinners' tickletongue and small prickly-ash, is a species of shrub in the family Rutaceae. It is native to the mountains of Trans-Pecos Texas in Brewster and Jeff Davis counties. Zanthoxylum parvum is a rare and poorly understood plant. It is sometimes considered a synonym of Zanthoxylum americanum.
Olearia decurrens, commonly known as the clammy daisy bush, is a shrub or subshrub species in the family Asteraceae native to inland Australia.
Allocasuarina striata, commonly known as the small bull oak, stalked oak-bush or the tall oak-bush, is a shrub of the genus Allocasuarina native to South Australia.
... Examples of subshrubs include candytuft, lavender, and rosemary. These broad definitions are ...