Lindl.
Description
Rosa brunonii, the Himalayan musk rose, is a vigorous climbing or scrambling shrub of the Himalaya and adjacent ranges, recorded by GBIF (435 occurrences) from China, Nepal, India, Bhutan, Pakistan and Afghanistan, with cultivated and naturalised reports in Europe, North America and elsewhere reflecting its long history in gardens. It grows in forest margins, thickets, ravines, hedgerows and on open slopes throughout the temperate zone, generally between about 1500 and 3500 m. The plants illustrated from Thimphu in Bhutan at 2500 m in May and from south of Tara Lake in western Nepal at 3000 m in June capture its early-summer flowering across this elevational band.
The species is a robust, long-trailing shrub with arching, often reddish stems armed with stout, recurved, flattened prickles. The leaves are alternate, imparipinnate with usually five to seven leaflets that are oblong-lanceolate, finely serrate and characteristically greyish-green and softly pubescent beneath, with stipules adnate to the petiole. The flowers are borne in many-flowered corymbose cymes; each is fragrant, with five white, broadly obovate and emarginate petals surrounding numerous yellow stamens, the styles united into an exserted column. The receptacle ripens into a small, ovoid to subglobose, orange-red hip crowned by the deciduous sepals.
Rosa brunonii belongs to section Synstylae, the white-flowered, united-styled climbing roses, and is the principal Himalayan representative of the musk rose group long valued horticulturally and used in the parentage of cultivated ramblers. The clustered, scented flowers attract bees and other insects, and the bird-dispersed hips spread the species along forest edges. It is abundant and ecologically robust throughout its native range and is of no conservation concern.
Author: Lindl. · Sources: POWO (Kew), GBIF, Flora of China, Flora of Bhutan, Flora of Pakistan, The Genus Rosa (Phillips & Rix)