Himalayan blackberry

Rubus armeniacus Focke

Description from Invasive.org

Appearance
Rubus armeniacus is a perennial shrub, that is native to Eurasia. Stems grow to 15 ft. (4.6 m) before arching and trail the ground for up to 40 ft. (12.2 m).
Foliage
The leaves of the prima cane (first year shoots) are 2.8-7.9 in. (0.9-2.4 cm) long and are palmately compound with 5 leaflets. In the second year, several side shoots are produced (flora canes) having smaller leaves with 3 leaflets. The leaflets are oval and toothed with thorns along the underside of the mid-rib.
Flowers
No flowers are produced in this plant’s first year of life. Flowering occurs in late spring to early summer; when white to pale pink flowers develop on the flora canes. Flowers have five petals, numerous stamens and are 0.8-1 in. (2-2.5 cm) in diameter.
Fruit
Fruits are an aggregate of drupelets that are black, when mature, and 0.5-0.8 in. (1.3-2 cm) in diameter.
Ecological Threat
As the plant grows and the stems touch the ground they root at the nodes, producing a dense thicket that shades out other plant species.

Resources


Selected Images from Invasive.org

View All Images at Invasive.org


Feature(s) thorns and leaf undersides
Forest and Kim Starr, Starr Environmental, Bugwood.org
Additional Resolutions & Image Usage
Fruit(s) fruit
Forest and Kim Starr, Starr Environmental, Bugwood.org
Additional Resolutions & Image Usage
Fruit(s)
John M. Randall, The Nature Conservancy, Bugwood.org
Additional Resolutions & Image Usage
Flower(s)
John M. Randall, The Nature Conservancy, Bugwood.org
Additional Resolutions & Image Usage
Plant(s)
John M. Randall, The Nature Conservancy, Bugwood.org
Additional Resolutions & Image Usage
Stem(s) prickly and angled stem
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage
Foliage Branch
Forest and Kim Starr, Starr Environmental, Bugwood.org
Additional Resolutions & Image Usage
Fruit(s) fruits
Eric Coombs, Oregon Department of Agriculture, Bugwood.org
Additional Resolutions & Image Usage

Distribution