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Spiraea plants are hardy, deciduous-leaved shrubs. The leaves are simple and usually short stalked, and are arranged in a spiralling, alternate fashion. In most species, the leaves are lanceolate (narrowly oval) and about 2.5 to 10 centimetres (0.98 to 3.94 in) long.
Spiraea douglasii is a woolly shrub growing 0.91–1.83 metres (3–6 feet) tall from rhizomes, forming dense riverside thickets. [6]The leaves are 2.5–10.2 centimetres (1–4 inches) long and toothed towards the tips.
Primary (winter) hosts are Spiraea spp. and Citrus spp. with numerous secondary host plants, in well over 20 families, particularly in the Caprifoliaceae, Compositae, Rosaceae, Rubiaceae and Rutaceae families. This aphid has been found to have a preference for woody plants of a shrubby growth habit with citrus and apples being the most ...
Spiraea tomentosa grows to up to four feet high and prefers moist to wet soil and full sun. It blooms in summer. It blooms in summer. Each tiny, pink flower is about 1/16 of an inch wide and arranged in narrow, pyramid-shaped flowerheads that grow up to eight inches long.
Spiraea alba, commonly known as meadowsweet, [2] white meadowsweet, [3] narrowleaf meadowsweet, [4] pale bridewort, [5] or pipestem, [6] is native to the wet soils of the Allegheny Mountains and other portions of eastern North America, [7] but is currently endangered in the state of Missouri. It is naturalized in other parts of the world.
Kalmia: kalmia shrubs; Kalmia latifolia: mountain laurel Ericaceae (heath family) Lyonia: lyonia trees; Lyonia ferruginea: tree lyonia Ericaceae (heath family) Oxydendrum: oxydendrum trees; Oxydendrum arboreum: sourwood Ericaceae (heath family) 711 Rhododendron: rhododendron trees and shrubs; Rhododendron albiflorum: white-flowered rhododendron
It is a deciduous or semi-evergreen shrub that reaches a size of 1–2 m height, with many thin branches, arched, flexible and glabrous.The leaves are alternate, simple, small petiolate, with 2–6 cm long green lanceolate, elliptical-rhomboidal or slightly obovate lamina, with 3 nerves parallel from its base, irregularly crenate-dentate in its distal half.
Numerous plants have been introduced to the US state of New Jersey in the last four hundred years, and many of them have become invasive species that compete with the native plants and suppress their growth. Duke Farms identified 55 invasive species on its property and investigates methods to control them. Major invaders are: [1]