Rosa beggeriana
| Rosa beggeriana | ||||||||||||
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Rosa beggeriana , semi-double variety 'Polstjarnan' |
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| Rosa beggeriana | ||||||||||||
| Schrenk ex fish. & CAMey. |
Rosa beggeriana is a species of roses ( Rosa ) within the rose family (Rosaceae). It is common in Iran, Afghanistan, Kazakhstan, Mongolia, Pakistan, India and China.
description
Appearance and leaf
Rosa beggeriana grows as a shrub that reaches heights of 1.5 to 2, rarely up to 3 meters. The bark of the stem-round, slightly curved branches is initially green, sometimes tinged with reddish, usually with blue frosting and later purple-brown and bare. The spines that occur sporadically and in pairs under the leaves are yellowish or almost white, up to 8 millimeters long, curved, slender to mostly strong and gradually taper to a broad base. There are seldom bristles on the branches.
The alternate leaves are arranged in a petiole and a leaf blade and are 3 to 9 centimeters long. The petiole and the rhachis leaf are downy hairy and sometimes have small spines. The two stipules are usually fused with the petiole. The free area of the stipules is egg-shaped with a pointed upper end and a glandular serrate edge. The stipules have very long erect ears. The leaf blade is pinnate unpaired with five to nine, rarely eleven leaflets, which are often far apart. The leaflets are 0.8 to 2.5 centimeters long and 0.5 to 1.2 centimeters wide, broadly elliptical or elliptical-obovate with an almost rounded or broadly wedge-shaped base, pointed or rounded. blunt upper end and pointy single-sawn edge and smooth upper area. The leaflets are hairy or glabrous on both sides. A raised central nerve is clearly visible on the underside of the leaflets and is concave on the upper side.
Inflorescence, flower and fruit
The flowering period extends from May to July. The umbrella-like or paniculate inflorescences with a diameter of 2 to 3 centimeters each contain a few to many flowers; rarely is a single flower. The one to three, rarely four bracts are ovate with a pointed upper end and a glandular serrated edge. The 1 to 2 centimeter long, relatively thin flower stalk is glabrous to downy, rarely with sparsely hairy glandular and downy hair.
The flowers together with the bracts have a diameter of 2 to 3, rarely 3.5 centimeters. The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The flower cup (hypanthium) is almost spherical and hairless or hairy. The five leaf-like sepals , which fall off before the fruit ripens, are lanceolate, hairy glandular and downy on the underside, densely hairy, fine and downy on top, the edge is simple and the upper end is long pointed; they are erect or ascending according to the anthesis . The five free white or rarely pink petals are broadly obovate with a broad, wedge-shaped base and an edged upper end. The many stamens are much longer than the style. The many styles are hairy densely shaggy and form a compact head.
The red, blackish-purple-colored, bald rose hips with a diameter of 0.6 to 1, rarely up to 1.5 centimeters in diameter are relatively small and almost spherical, rarely egg-shaped. When ripe, the flower cups fall off together with the sepals. The fruits ripen in China from July to October.
Chromosome set
The basic chromosome number is x = 7; there is diploidy , i.e. 2n = 14. There are also populations with tetraploidy .
Use and ecology
The wild rose Rosa beggeriana grows best in a continental climate with hot summers and cold winters to a shrub up to 3 meters high that spreads through "root saplings". They smell of decay, which attracts flies to pollinate . It thrives in USDA climate zone 5 (minimum temperatures −22 to −27 ° C).
Rosa beggeriana is a cross partner in some hybrids.
Systematics, botanical history and distribution
Rosa beggeriana was discovered by the German-Baltic naturalist Alexander Gustav von Schrenk on an expedition in Turkestan . Botanists have described up to 50 subtaxa, most of which are no longer accepted.
It was first described in 1841 by Schrenk in Friedrich Ernst Ludwig von Fischer and Carl Anton von Meyer : Enumeratio Plantarum Novarum , Volume 1, p. 73.
Rosa beggeriana is common in Iran , Afghanistan , Kazakhstan , Mongolia , Pakistan (districts of northern Baluchistan , Chitral , Gilgit , Swat ), Kashmir , the Indian state of Uttar Pradesh and in China .
Synonyms for Rosa beggeriana Schrenk ex Fisch. & CAMey. are: Rosa anserinaefolia Boiss. , Rosa iliensis Chrshan. Boiss , Rosa lacerans . & Buhse , Rosa operta Sumner , Rosa silverhjelmii Schrenk .
Rosa beggeriana belongs to the section Cinnamomeae of the subgenus Rosa from the genus Rosa .
Several varieties of Rosa beggeriana have been described (selection):
- Rosa beggeriana Schrenk ex fish. & CAMey. var. beggeriana : It is common in Afghanistan, Kazakhstan, Mongolia and China. It thrives on slopes, valleys, river banks and roadsides at altitudes of 900 to 2000 meters in the Chinese provinces of Gansu and Xinjiang.
- Rosa beggeriana var. Lioui (TTYü & HTTsai) TTYü & TCKu : It occurs only in the Uighur autonomous region of Xinjiang .
Similar species
The two species Rosa beggeriana and Rosa laxa occurring in Xinjiang are morphologically very similar and the main distinguishing feature is that the sepals on the ripe rose hips of Rosa beggeriana fall off, while they are durable in Rosa laxa .
swell
- Gu Cuizhi, Kenneth R. Robertson: Rosa. : Rosa beggeriana. , P. 355 - online with the same text as the printed work , In: Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China. Volume 9: Pittosporaceae through Connaraceae. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2003, ISBN 1-930723-14-8 . (Sections Description and Occurrence)
Individual evidence
- ↑ a b c d e f g h i j k l m n o Gu Cuizhi, Kenneth R. Robertson: Rosa. : Rosa beggeriana , p. 355 - online with the same text as the printed work , In: Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China. Volume 9: Pittosporaceae through Connaraceae. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2003, ISBN 1-930723-14-8 .
- ↑ a b c d e f g h i Sven Landrein, Renata Borosova, Joanna Osborne: Rosaceae. : Rosa beggeriana at Tropicos.org. In: Flora of Pakistan . Missouri Botanical Garden, St. Louis, Institute for Plant Conservation, University of Karachi and Missouri Botanical Press, Karachi and St. Louis 2009.
- ↑ Rosa beggeriana at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ a b c S. Yang, YJ Han, SH Yang, H. Ge: Karyotype and Flow Cytometry Analysis of the Natural Populations of. Rosa beggeriana and Rosa laxa in Xinjiang, China. , Acta Horticulturae - International Society for Horticultural Science = ISHS, VI International Symposium on the Taxonomy of Cultivated Plants 1035, 2013, pp. 205-213. [1]
- ^ Charles & Brigid Quest-Ritson: Roses: the great encyclopedia / The Royal Horticultural Society; Translation by Susanne Bonn; Editor: Agnes Pahler; Dorling Kindersley, Starnberg 2004, p. 54, ISBN 3-8310-0590-7 .
- ↑ Data sheet from Rogers Roses . ( Memento of the original from December 26, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Schrenk scanned in at biodiversitylibrary.org in 1841 .
- ↑ a b Rosa beggeriana at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed May 17, 2015.
- ↑ Rosa beggeriana in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved May 17, 2015.
