Rosa will multiflora

The rose tree multiflore ( Rosa will multiflora ) is a species of Rosier very vigorous and very floriferous, classified in the section of the '' Synstylae '', originating in the Far East (China, Taiwan, Japan and Korea). This species is in the beginning many forms of climbing rose trees and the class of the Polyanthas.

There are very many forms and varieties of which:

Rosa will multiflora VAr. adenochaeta (Koidz.) Ohwi ex H.Ohba, with flowers simple, pink,
Rosa will multiflora VAr. alboplena Te T.Yu & T.C.Ku, with white double flowers,
Rosa will multiflora VAr. carnea Dreaded & Thory, with pink double flowers,
Rosa will multiflora VAr. cathayensis Rehder & E.H.Wilson, with white flowers up to 4 cm in diameter,
Rosa will multiflora VAr. will multiflora , with white flowers from 1,5 to 2 cm in diameter,
Rosa will multiflora VAr. plena Regelation,
Rosa will multiflora VAr. watsoniana (Crép.) Matsum.

Synonymous:

Rosa cathayensis (Rehder & E.H.Wilson) L.H.Bailey
Rosa ×floribunda hort. ex Andrews
Rosa polyantha Siebold & Zucc. (synonym of the variety Rosa will multiflora VAr will multiflora).

Description

It is a Arbuste climbing on the other plants until a height from 3 to 5 meters, with the robust stems provided with bent pivots (sometimes absent).

The Sheet S, from 5 to 10 cm length, imparipennées, are made up from 5 to 9 leaflets and carry at the base of the petiole of stipulate feathery.

The Fleur S, small (from 1,5 to 4 cm in diameter), white or pink, are gathered into large pyramidal Corymbe S. The styles are welded in a single column, characteristic of the section of the Synstylae . Flowering takes place at the beginning of the summer, i.e. at the end of June and July in the northern hemisphere.

The fruits, red with crimson with maturity, have 6 to 8 mms in diameter.

Distribution and habitat

The surface of origin of this species is located in the Far East:

continental China (Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Henan, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Zhejiang),
Korea,
Taiwan,
Japan (Hokkaido, Honshu, Shikoku).

It is in Japan, where it is known under the name of No-Ibara , the wild rose tree most common.

It was largely naturalized in all the continents: British Isles, South Africa, the United States and Canada, New Zealand, sometimes behaving like a invading Plant.

One meets it in the forests and on banks of river between 300 and 2000 meters of altitude. it is a very prolific plant which puts up with very varied conditions of ground and moisture.

Culture and use

Rosa will multiflora is cultivated like decorative Plante and is regarded as the type of the class of the “climbing rose trees multiflores”. Many varieties or hybrids were created at the end of the XIXe century and first half of the XXe century, in particular by the German rosierists such as J.C. Schmidt and R. Geschwind.

It is also used as Porte-greffe because it supports the acid grounds, for the reproduction by grafting of cultivars of improved rose trees. One uses in particular for this purpose the varieties Rosa will multiflora “Japonica” and Rosa multiflora' Inermis'.

It multiplies easily by Bouture S.

In the east of the North America, the rose tree multiflore became a invading Plante, whereas it had been introduced at the origin like measures for the conservation of the grounds and to support the wildlife. It is easy to distinguish from the American indigenous rose trees thanks to its large inflorescences, which bear many flowers or fruits, often more than one dozen, while the American species carry from there only one or some by branch.

With time, this plant became an ecological problem engraves because of its capacity to push under varied conditions of light, ground and moisture, and because its seeds are widely diffused by the birds. Once installed, it forms almost impenetrable thickets which replace the indigenous plants and create a fire hazard in the wild areas. In certain places of the the United States, one classified the rose tree multiflore like “bad harmful grass”. In the areas of pasture, this rose tree is generally regarded as a true plague, although it can be grazed by the Chèvre S.

Varieties, changes and hybrids

Rosa will multiflora “Adenochæta”, very rustic, with large white flowers,
Rosa will multiflora “Flora pleno” and “Carnea” which differ by their double flowers white or pink,
Rosa will multiflora “Cathayensis”, with large white flowers at the rosy edge,
Rosa will multiflora watsoniana , found in 1850 in a garden Japan board,
Rosa will multiflora wilsonii , with white simple flowers, very anthology,
Rosa will multiflora “Chick”, change or hybrid, dwarf rose with simple, white flowers or pinks of May at October,
Rosa will multiflora “Platyphilla”, the “seven sisters pink” with the double flowers in corymbes, passing from carmine to the pink then with the ivory.

Hybrids close to the type of the species:

“Rambling Rector”, in semi-double white flowers and “Seagull”, with double white flowers,
“Aglaia” ( Rosa will multiflora X “Dreams of gold”), first great sarmentous yellow, with the flowers yellow straw, semi-double scented,
“Ghislaine de Féligonde”, with the multiples small double flowers passing from the yellow to the ivory,
“Veilchenblau” or “blue-purple”, obtained by Schmidt in 1909, of very rare purple dark, still very present in rural environment.

The rose trees Polyantha ( Rosa will multiflora X Rosa chinensis ) of which the first are obtained by Jean-Baptiste Guillot: in 1875 “Daisy” with white flowers, then in 1880 “Mignonnette”, with pink flowers and in 1887 “Glory of Polyanthas”,

“Daisy” is dwarf with all small double white flower bunchs,
“Mignonnette” is him also dwarf and its flowers in bouquets are pink,
“Yvonne Rabier”, abundant double pinks, very going up, one of the most beautiful white rose trees,
“pink Orleans” is an important dwarf bush by its descent: most of the current polyanthas.

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