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Empetrum nigrum, crowberry, [3] black crowberry, mossberry, or, in western Alaska, Labrador, etc., blackberry, is a flowering plant species in the heather family Ericaceae with a near circumboreal distribution in the Northern Hemisphere.
Rubus ursinus is a wide, mounding shrub or vine, growing to 0.61–1.52 metres (2–5 feet) high, and more than 1.8 m (6 ft) wide. [3] The prickly branches can take root if they touch soil, thus enabling the plant to spread vegetatively and form larger clonal colonies.
Rubus parviflorus is a dense shrub up to 2.5 meters (8 feet) tall with canes no more than 1.5 centimeters (1 ⁄ 2 inch) in diameter, often growing in large clumps which spread through the plant's underground rhizome.
Unmanaged plants tend to aggregate in a dense tangle of stems and branches, [3] which can be controlled in gardens or farms using trellises. [1] [8] Blackberry shrubs can tolerate poor soils, spreading readily in wasteland, ditches, and roadsides. [3] [7] [10] The flowers bloom in late spring and early summer on the tips of branches.
Rubus is a large and diverse genus of flowering plants in the rose family, Rosaceae, subfamily Rosoideae, commonly known as brambles. [3] [4] [5] Fruits of various species are known as raspberries, blackberries, dewberries, and bristleberries.
Rubus occidentalis is a deciduous shrub growing to 2 to 3 metres (6.6 to 9.8 ft) tall. [6] The leaves are pinnate, with five leaflets on leaves, strong-growing stems in their first year, and three leaflets on leaves on flowering branchlets.