Greater Periwinkle
Dogbane Family
Greater periwinkle (Vinca major) is a vine that is native
to Europe and North Africa. It is common in and near developed areas
throughout North America. There are only a few small populations in
Sequoia and Kings Canyon National Parks. They are a source of concern,
however, because in moist areas periwinkle creates a dense carpet
that excludes virtually all other plant species.
Identification
Greater periwinkle is a low sprawling vine with large, violet
morning-glory-like flowers. The leaves are about 7 centimeters (2.8
inches) long, and rather waxy. Greater periwinkle exudes a milky
latex when cut open. The flowers are large (3-5 centimeters, or 1.2-2
inches) long and funnel-shaped.
Look-Alikes
Greater periwinkle is not easily confused with any other plant
species in the parks. It has the general appearance of a low sprawling
vine, rather like English ivy but with much smaller leaves.
Natural History
Greater periwinkle does not reproduce from seed in California.
It spreads by vegetative means. The vine-like stems can
root at the nodes and completely dominate moist areas.
Management
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The showy greater periwinkle flowers are sterile in California.
Photo by Brother Alfred Brousseau,
St. Mary's College.
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Greater periwinkle is most commonly found in shady sites and
riparian corridors near Ash Mountain headquarters and housing area.
In 2002, Sequoia and Kings Canyon National Parks resource management
personnel began manual removal of this species from riparian
areas. These efforts include complete removal of roots
and stems. In developed areas, mechanical removal with a brush cutter
or weed whip may be possible. The ultimate goal is eradication of
this species from the parks.
Note: please visit our What
is being done?
page to see photographs of greater periwinkle eradication.
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