Rosa davidii
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Rosa davidii |
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| Crép. |
Rosa davidii , also David Rose called, is a plant of the genus roses ( Rosa ) within the family of the rose family (Rosaceae).
description
Rosa davidii forms a hardy shrub that reaches heights of 1.5 to 4 meters. The narrow, imparipinnate leaves are 7 to 14 centimeters long including the petiole and usually consist of seven or nine - rarely five or eleven - leaflets .
Rosa davidii blooms once and relatively late. Four to twelve flowers stand together in loose, dold-like inflorescences . The hermaphrodite, slightly sweet-scented flowers are about 2 to 4 centimeters in diameter, radial symmetry and five-fold with a double flower envelope . The have five free sepals are leaf-like. The five free petals are pink, often with a "light spot". There are many “golden” stamens . Along the branches hang the scarlet rose hips when ripe in autumn , which are bottle-shaped with a length of 1.8 to 2.5 centimeters and a diameter of 1 to 1.5 centimeters. The upright sepals still sit on the rose hips.
Occurrence
It thrives at altitudes from 1,600 to 3,000 meters in the central and western Chinese provinces of Gansu , Ningxia , Shaanxi , Sichuan and Yunnan .
Systematics
It was first collected by Père David . The first description of Rosa davidii was in 1874 by François Crépin .
From Rosa davidii several varieties have been described:
- Rosa davidii Crép. var. davidii
- Rosa davidii var. Elongata Rehder & EHWilson
- Rosa davidii var. Pungens Focke
- Rosa davidii var. Subinermis Focke
literature
- Charles & Brigid Quest-Ritson: Roses: The Great Encyclopedia / The Royal Horticultural Society; Translation by Susanne Bonn; Editor: Agnes Pahler; Dorling Kindersley, Starnberg 2004, p. 114, ISBN 3-8310-0590-7
Web links
- Rosa davidii in the Flora of China , Volume 9. (Eng.)
- Rogers Roses (Engl.)
- Rosa davidii on the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
- Rosa davidii in USDA (Engl.)