Rosa multiflora is a multistemmed, thorny, perennial shrub that grows up to 15 ft. (4.6 m) tall. The stems are green to red arching canes which are round in cross-section and have stiff, curved thorns.
Leaves are pinnately compound with 7-9 leaflets. Leaflets are oblong, 1-1.5 in. (2.5-3.8 cm) long and have serrated edges. The fringed petioles of Rosa multiflora usually distinguish it from most other rose species.
Small, white to pinkish, 5-petaled flowers occur abundantly in clusters on the plant in the spring.
Fruit are small, red rose hips that remain on the plant throughout the winter. Birds and other wildlife eat the fruit and disperse the seeds.
This is considered a watch list species.
The plant was originally brought to the US as rootstock for ornamental roses in the 1800s, then promoted as “living fences” in the 1930s, and encouraged as wildlife enhancement in the 60s.
Man-made or disturbed sites, meadows and fields, shores of rivers or lakes, shrublands or thickets
Multiflora rose reproduces primarily by seed, a single plant can carry up to 1 million in a year. The seeds remain viable in the soil for up to 20 years. These perennial plants will also sprout from existing roots season after season. Leaves appear very early in spring, and flowers begin to bloom in June. Fruits develop in late summer and remain on the plant through winter. Multiflora rose can also reproduce by layering – when stem tips touch the ground and take root.
- Multiflora rose (Rosa multiflora) can form impenetrable thickets that exclude native plant species.
- Birds eat the fruits and disperse the seeds which are still viable after passing through the digestive tract.
- Arching canes that reach the ground can take root and form new plants.
- This plant has a wide tolerance of soil, moisture, and light conditions. It has the ability to thrive in dense woods, open fields, prairies, pastures, and is readily found along stream banks and roadsides.
- Seed bank can remain viable for 10-20 years creating the need for a long-term management plan.
Multiflora Rose flower, 5473560, Rob Routledge, Sault College, Bugwood.org
Multiflora Rose leaf and stem, 5473559, Rob Routledge, Sault College, Bugwood.org
Hypanthia or hips, 0002060, James W. Amrine Jr., West Virginia University, Bugwood.org
Flowering plant in May, 0016089, James H. Miller, USDA Forest Service, Bugwood.org
Bristled margins on petiole, 0016092, James H. Miller, USDA Forest Service, Bugwood.org
Immature fruit (hips), 0016094, James H. Miller & Ted Bodner, Southern Weed Science Society, Bugwood.org