Missouri Department of Conservation
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Multiflora Rose

Rosa multiflora
Family: 
Rosaceae (roses)
Description: 

A medium-sized, thorny shrub with a spreading growth form, often forming thickets.

Leaves are alternate, compound, divided into 5-11 leaflets (usually 7-9). Each leaflet is broadly oval and toothed along the edge.

Blooms May through June. Flowers are clustered, numerous, white, 3/4 to 1 1/2 inches across. The clusters are rounded or pyramidal and 3-6 inches across.

Fruits are small, firm, red hips that may remain on the plant well into winter.

Similar species: Examine the small leafy appendage (stipule) that hugs the stem at the base of each compound leaf. On multiflora rose, the edges of the stipules are fringed with many teeth, resembling a comb. Our native roses, however, have stipules with smooth margins (no teeth).

Size: 
Height: to 15 feet; root crown diameter: to 8 inches.
Habitat and conservation: 
Occurs in old fields, pastures and roadsides. May occur in dense forests, particularly in disturbed areas such as treefall gaps and along streams. It has a wide tolerance for different soil, moisture and light conditions but does not grow well in standing water. First introduced to North America in 1886 as a rootstock for ornamental roses, then planted widely for erosion control and as living fences, it soon spread and became seriously invasive.
Distribution in Missouri: 
Widespread and statewide.
Status: 
Invasive. Native to Japan. During the last century, federal and many state conservation agencies promoted the planting of multiflora rose in an effort to control erosion and provide cover and winter food for wildlife. Those hopeful ideas waned when the plant began to spread and became a serious invader of agricultural lands, pastures and native ecosystems throughout the eastern United States. Now, it is considered an invasive plant; in 1983, the state of Missouri declared it a noxious weed.
Life cycle: 
The great majority of plants develop from seeds that fall to the soil nearby the parent plants. Birds and mammals, however, eat the rose hips and can disperse the seeds over greater distances. The seeds may remain viable in the soil for 10-20 years. This plant also spreads by “layering,” which is when new plants arise at the places where the tips of canes touch the ground and put out roots.
Human connections: 
People brought this plant to America as an ornamental, then planted it widely, hoping it would have a beneficial effect on the environment. Time, however, has taught us that the negative effects outweigh the positive ones. This plant has taught land managers a hard lesson about hindsight.
Ecosystem connections: 
Multiflora rose invades prairies, savannas, open woodlands and forest edges. A thorny, bushy shrub that forms impenetrable thickets, it smothers out other vegetation. Although it provides some benefits for wildlife, the way it degrades our natural communities is worse.

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