BugwoodWiki Article

Himalayan blackberry
Rubus armeniacus Focke

Overview

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.

General Description:

The following description of Rubus discolor is taken from Munz and Keck (1973).

Rubus discolor is a robust, sprawling, more or less evergreen, glandless shrub of the Rose Family (Rosaceae). The shrubs appear as "great mounds or banks" , with some of the canes standing up to 3 m tall. Other canes are decumbent, trailing or scandent up to 20-40 feet long , frequently taking root at the tips. The primocanes are pilose-pubescent, becoming nearly glabrous with age. These are very strongly angled and furrowed, bearing well-spaced, heavy, broad-based, straight or somewhat curved prickles 6-10 mm long. Primocane leaves are 5-foliolate, glabrous above when mature and cano-pubescent to cano-tomentose beneath. There are hooked prickles on the petioles and petiolules. The leaflets are large and broad with the terminal leaflet roundish to broad oblong. Leaflets are abruptly narrowed at the apex, unequally and coarsely serrate-dentate. Floricane leaflets are 3-5 foliolate and smaller than on the primocanes.

The inflorescence is a large terminal cluster with branches in the lower axils. The peduncles and pedicels are cano-tomentose and prickly. The flowers are white or rose colored, 2-2.5 cm across, with broad petals. Sepals are broad, cano-tomentose, conspicuously pointed and soon reflexed, approximately 7-8 mm long. The roundish fruit is black and shiny, up to 2 cm long, with large succulent drupelets. The fruit ripens late compared with native blackberries and over a considerable interval , from midsummer to autumn.

Resources

Selected Images


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5162060

Himalayan blackberry
Rubus armeniacus
Feature(s)
Forest and Kim Starr
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5162062

Himalayan blackberry
Rubus armeniacus
Fruit(s)
Forest and Kim Starr
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5164027

Himalayan blackberry
Rubus armeniacus
Fruit(s)
John M. Randall
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5164029

Himalayan blackberry
Rubus armeniacus
Flower(s)
John M. Randall
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5164030

Himalayan blackberry
Rubus armeniacus
Plant(s)
John M. Randall
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5387625

Himalayan blackberry
Rubus armeniacus
Stem(s)
Joseph M. DiTomaso
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5416753

Himalayan blackberry
Rubus armeniacus
Foliage
Forest and Kim Starr
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5435657

Himalayan blackberry
Rubus armeniacus
Fruit(s)
Eric Coombs

Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Rosidae
Order: Rosales
Family: Rosaceae
Genus: Rubus

Other System Links

Plants: RUAR9
Bayer: RUBDI
GRIN: 32263
ITIS: 24852
NPDN Pest: PELATBK
NPDN Host: 37268

Synonyms and Other Names

Other Common Names:
Armenian Blackberry

Related Scientific Names:

Rubus discolor Focke(Synonym)
Rubus procerus auct. non P.J. Müll. ex Genev(Synonym)

Categories

Category: Shrub or Subshrub