Rosa roxburghii

R. roxburghii is also known commonly as the 'sweet chestnut rose', the 'chestnut rose', the 'burr rose', and the 'chinquapin rose'. It was originally found in China in the early 1800s, where it had been growing for generations, and it is rarely grown in European gardens. and Trattinick published this name change in 'Rosacearum monographia' on page 233 in 1823. Rosacearum monographia ('Monograph of the Rose Family') covered generic and species descriptions of plants in the rose family, although it was not illustrated. The specific epithet was spelled roxbourgii in the protologue, It was verified as Rosa roxburghii by United States Department of Agriculture and the Agricultural Research Service on 15 February 1996, Rosa roxburghii f. normalis is an accepted name by the RHS and listed in the RHS Plant Finder book. It is also often sold under the name Rosa roxburghii 'plena'. Normally, advertised as a medium pink double form, After gene sequencing was carried out it was found that R. roxburghii is closely related to Rosa odorata var. gigantea. ==Distribution and habitat==

Rosa roxburghii is native to temperate areas of eastern Asia, within China and Japan. it is found in the provinces of Anhui, Zhejiang, Fujian, Hunan, Hubei, Gansu, Jiangxi, Guizhou, Shaanxi, Sichuan, Yunnan, Guangxi and Xinjiang. Habitat It is found growing in various habitats, including mountain forests, thickets, slopes, stream sides, semi-arid river valleys, waysides, and on roadsides. In China, it is commonly found on banks between rice fields, where it can obtain plenty of water during the summer. They can be found at an altitude of above sea level. ==Uses==

, California Rosa roxburghii has various uses, including as an ornamental, and has a sweet and sour taste. The phytochemical characteristics of the fruit include 135 volatile organic compounds and 59 compounds in methanol extracts, including 13 organic acids, Roxbins A and B were also found in the fruit. There is only a thin layer of edible flesh surrounding the many seeds. It can be ground into a powder, and mixed with flour or added to other foods as a supplement. In China, it is the commercial source of rosehip powder. In culture The Japanese name for the chestnut rose is izayoibara, (十六夜薔薇), where the term izayoi (十六夜) refers to the morphology of the flower lacking a petal, making it seem as if it has a notch at one side. ==References==