Rosa multiflora Merino
Multiflora rose
Species recognized by KL Wilson and WG Berendsohn (eds), IOPI Global Plant Checklist
in 
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General Description
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Source and Additional Information
Supplier
Source
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Editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
Location
Source URL
Citation
Flora of China Vol. 9: 370 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Two varieties are recognized here. Plants of this species from Taiwan are usually called var. formosana Cardot (Notul. Syst. (Paris) 3: 263. 1916), which is characterized by small leaflets, 1–3 cm × 0.8–1.5 cm, but this taxon seems to fall within the overall range of variation for var. multiflora. Two other varieties are cultivated in China, but do not occur spontaneously: var. alboplena T. T. Yü & T. C. Ku (Bull. Bot. Res., Harbin 1(4): 12. 1981), which has white, double flowers, and var. carnea Thory (in Redouté, Roses 2: 67. 1821), which has pink, double flowers.
References
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Flora of China @ eFloras.org
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200005226
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Description
Source and Additional Information
Supplier
Source
Project
Editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
Location
Source URL
Citation
Flora of China Vol. 9: 370 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
Permalink
Copy and paste in email or document
:
Shrubs climbing. Branchlets terete, usually glabrous; prickles paired below leaves, sometimes sparsely scattered, curved, to 6 mm, stout, flat, gradually tapering to broad base. Leaves including petiole 5–10 cm; stipules pectinate, mostly adnate to petiole, margin glandular-pubescent or not; rachis and petiole pubescent or glabrous, glandular-pubescent, shortly prickly; leaflets (3–)5–9, obovate, oblong, or ovate, 1–5 × 0.8–2.8 cm, abaxially pubescent, adaxially glabrous, base rounded or cuneate, margin simply serrate, apex acute or rounded-obtuse. Flowers numerous in corymb, 1.5–4 cm in diam.; pedicel 1.5–2.5 cm, puberulous, glabrous, or glandular-pubescent, margin sometimes pectinate; bracts at base of pedicel, small. Hypanthium subglobose, glabrous. Sepals 5, deciduous, lanceolate, abaxially glabrous, adaxially pubescent, margin entire or with 2 linear lobes at middle. Petals 5, semi-double or double, white, pinkish, or pink (in some cultivated plants), fragrant, obovate, base cuneate, apex emarginate. Styles connate in column, exserted, slightly longer than stamens, glabrous. Hip red-brown or purple-brown, subglobose, 6–8 mm in diam., glabrous, shiny. 2n = 14*, 21.
References
-
Flora of China @ eFloras.org
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200005226
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Comments
Source and Additional Information
This species produces flowers that are smaller in size, but with greater abundance, than the native roses. It is usually quite attractive while in full bloom. Unlike the native roses, the base of each compound leaf in the Multiflora Rose has a pair of stipules with several slender teeth. In the native roses, these pairs of stipules are without teeth, except for a single tooth at the corner of each stipule. The flowers of the Multiflora Rose are white, while the flowers of the native roses are usually pink. It resembles Rosa setigera (Wild Climbing Rose) to some extent, as they both can assume the form of a climbing vine and in the center of their flowers there is a column of united styles. However, the Wild Climbing Rose has compound leaves with fewer leaflets (usually 3, sometimes 5), while the Multiflora Rose has compound leaves with 5-9 leaflets. Like other native roses, the flowers of the Wild Climbing Rose are larger in size and pink in color, while its stipules lack the numerous teeth of the Multiflora Rose.
Description
Source and Additional Information
This introduced perennial plant has woody stems and can assume the form of a shrub or climbing vine. In the form of a shrub it is about 3-6' tall, while as a climbing vine it gets up to 12' tall if there is other vegetation nearby to cling to. The round stems are heavily armed with stout curved thorns. They are initially green, but eventually turn brown and woody. The alternate compound leaves are odd pinnate with 5-9 leaflets. The leaflets are up to 2½" long and ¾" across. They are ovate or obovate and serrated along the margins. At the base of each compound leaf is a pair of stipules with long slender teeth. This is a distinctive characteristic of the Multiflora Rose. The flowering stalks produce an abundance of white flowers on spreading racemes or corymbs. Each flower is about 1½" across, consisting of 5 white petals, 5 green sepals, a central column of styles, and an abundance of stamens with bright yellow anthers. The blooming period occurs during the late spring or early summer, and lasts about 3-4 weeks. The flowers have a typical rose-like fragrance. Each flower is replaced by a rather small rose hip that turns red with maturity. There are no sepals at the apex of each rose hip because they are deciduous. There are no hairs on the foliage, stems, or rose hips. Each rose hip is rather dry and fleshy on the inside, where there are several dark seeds. The root system consists of a taproot.
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"Rosa multiflora Merino". Encyclopedia of Life, available from "http://www.eol.org/pages/630393". Accessed
21 Mar 2010.
