Key identifying traits
- Flowers are bright
yellow and bell-shaped
- Stems are purplish,
hairy, and square-shaped
- Leaves are opposite,
serrated & ovate-shaped with a silver or white pattern on top;
the undersides are a lighter green or sometimes purplish color
- It is viny, grows
prostrate & may have an unpleasant odor
Biology
and ecology
- A perennial plant
spreading by seeds & above ground runners (stolons)
- It tolerates a wide
variety of growing conditions, is frost tolerant and can grow in
lightly shaded to well shaded areas
- It is a popular choice
for ground cover & is also used in hanging baskets and flower
beds
- This plant is native to
temperate regions of Asia
- Some infestations are
believed to have started by improperly disposed yard & basket
waste
Control
Prevention – Learn to identify
plants; start monitoring early in the season; dispose of clippings
and old hanging baskets or tubs properly
Biological – No known
biological control in our area
Cultural – Do not plant this as
a ground cover or in sites where it can easily spread and escape
Mechanical –
Plants grow back heavily if cut and
although easy to pull any remaining root fragments will grow new
plants
Chemical – There are no specific
chemical recommendations yet in the
PNW Weed Management handbook but this plant should be
susceptible to dicamba, glyphosate and mixtures with triclopyr
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Photo by Richard Old, www.xidservices.com |
