Rosa gigantea
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Rosa gigantea |
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| Collett ex Crép. |
One of the earlier names is Rosa gigantea . It is a plant of the genus roses ( Rosa ) within the family of the rose family (Rosaceae).
description
It is a large, spreading shrub . In suitable places it also grows as a climbing rose, the stem axes of which climb up to 30 meters high into trees. The alternate leaves are pinnate unpaired and consist of five to seven leaflets. The leaflets are long, narrow and soft.
The flowering period extends from March to May. The flowers, which are relatively large for a wild rose species, are up to 15 centimeters in diameter and have radial symmetry and five-fold with a double flower envelope . The five free petals are white to yellowish, appear. The rose hips are also very large and are yellowish when ripe.
The number of chromosomes is 2n = 21.
distribution
The natural range of this type of rose extends from Yunnan in western China via Myanmar to Manipur in India . It grows in forests with a cool, temperate climate, on rubble slopes and in hedges .
Systematics
The accepted name is Rosa odorata var. Gigantea (Crépin) Rehder & EHWilson with the synonyms. Rosa gigantea Collett ex Crépin , Rosa duclouxii H.Lév. , Rosa macrocarpa Watt ex Crépin , Rosa xanthocarpa Watt ex E. Willmott . The epithet gigantea refers to the unusually large flowers for a wild rose species and the epithet macrocarpa of the synonym refers to the unusually large fruits.
In hobby gardening literature it is assumed: The first publication of Rosa gigantea was by Henry Collett . A synonym for Rosa gigantea Collett is Rosa macrocarpa .
Significance for garden culture
Rosa gigantea is also sometimes grown as a species in the garden. It needs warm regions and does well in California and southern France , for example . This wild rose is damaged at temperatures below –8 ° C.
Rosa gigantea is one of the most important wild rose species for rose breeding. Above all, it played a role in the cultivation of the tea roses . Many of the roses that were imported from China to Europe in the 18th and 19th centuries are descended from Rosa gigantea . In addition to climbing roses such as the 'Belle Portugaise' variety from the French rose breeder Cayeux, Alister Clark also developed shrub roses from her for the climatic conditions in Australia.
literature
- Heinrich Schultheis: Roses: the best kinds and sorts for the garden , Ulmer, Stuttgart 1996, ISBN 3-8001-6601-1
- Roger Phillips and Martyn Rix: Rosarium - Ulmer's large rose book - The best varieties for the garden and winter garden , Eugen Ulmer Verlag, Stuttgart 2005, ISBN 3-8001-4776-9
- Charles & Brigid Quest-Ritson: Roses: The Great Encyclopedia / The Royal Horticultural Society; Translation by Susanne Bonn; Editor: Agnes Pahler; Dorling Kindersley, Starnberg 2004, p. 168, ISBN 3-8310-0590-7
Individual evidence
- ↑ Rosa gigantea at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis