Rubus caesius

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Rubus caesius
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rosaceae
Genus: Rubus
Species: R. caesius
Binomial name
Rubus caesius
L.

Rubus caesius is a species of dewberry, known as the European dewberry. Like other dewberries, it is a species of flowering plant in the rose family, related to the blackberry. It is found throughout Great Britain and Ireland,[1] as well as in Ontario, Indiana, Kentucky, Michigan, and New York.[2]

Description[edit]

Rubus caesius is similar to and often confused with forms of Rubus fruticosus.[1] It is a small shrub growing up to 2 m (6 ft 7 in) tall with biennial stems which die after fruiting in their second year. It sends out long runners which root at the tip to form new plants. The stems are bluish-grey and sometimes prickly. The alternate leaves are hairy above and below. They are stalked and the leaf blades are palmate in shape, either consisting of three oval leaflets with serrated margins and acute points or just being three-lobed. The inflorescence is a loose cluster of several white flowers about 2.5 cm (1 in) in diameter. The calyx has five sepals and the corolla is composed of five spreading petals with finely toothed margins. There is a boss of stamens in the centre and there are several pistils. The fruit is an aggregate of several black, fleshy drupes with a bluish waxy bloom. The dewberry flowers from June to September.[3]

Distribution and habitat[edit]

Rubus caesius most often inhabits areas with rocky, basic soil and light shade.[1] It is often found in forest margins, coppices, rocky broadleaf woods and waterside thickets.[3] It is native to Europe, but has been introduced to several locations in North America.[4] The Dewberry can hybridise with the raspberry {Rubus idaeus) and the stone bramble (Rubus saxatilis).[3]

References[edit]

  1. ^ a b c "Rubus caesius (Dewberry)". Online Atlas of the British & Irish Flora. Biological Records Centre. Retrieved 9 August 2013. 
  2. ^ "PLANTS profile for Rubus caesius (European dewberry)". USDA. Retrieved 9 August 2013. 
  3. ^ a b c "Dewberry: Rubus caesius". NatureGate. Retrieved 29 December 2013. 
  4. ^ "Occurrence of European Dewberry, Rubus caesius (Rosaceae), Naturalized in Iowa and Michigan". Michigan Botanist. Retrieved 9 August 2013. 

External links[edit]