08/04/2026
๐จ ๐๐ง๐ฏ๐๐ฌ๐ข๐ฏ๐ ๐๐ฉ๐๐๐ข๐๐ฌ ๐ญ๐จ ๐๐๐ญ๐๐ก ๐
๐จ๐ซ ๐จ
Japanese Hops (๐๐ถ๐ฎ๐ถ๐ญ๐ถ๐ด ๐ซ๐ข๐ฑ๐ฐ๐ฏ๐ช๐ค๐ถ๐ด)๐ฟ
Japanese hops (aka hooked hair hops) is a ๐ฉ๐ซ๐จ๐ก๐ข๐๐ข๐ญ๐๐ ๐ข๐ง๐ฏ๐๐ฌ๐ข๐ฏ๐ ๐๐ง๐ง๐ฎ๐๐ฅ ๐ฏ๐ข๐ง๐ that quickly invades moist disturbed areas, climbing over and smothering native vegetation. Contact with the plant may cause ๐๐ฅ๐ข๐ฌ๐ญ๐๐ซ๐ฌ ๐๐ง๐ ๐๐๐ซ๐ฆ๐๐ญ๐ข๐ญ๐ข๐ฌ, so wear protective clothing when handling it. โ ๏ธ
๐ฟ ๐๐จ๐ฐ ๐ญ๐จ ๐๐๐๐ง๐ญ๐ข๐๐ฒ ๐๐ญ:
โ๏ธ Leaves: Opposite, 2โ5 inches long, with serrated edges and divided into five or more deep lobes.
โ๏ธ Stems: Annual, herbaceous vines that can grow up to 35 feet long with stiff, downward-pointing prickly hairs.
โ๏ธ Flowers: Small, dull green flowers form in the leaf axils. Male flowers grow on upright spikes, and female flower clusters droop. Blooms from July through September.
โ๏ธ Seeds: Yellow-brown achenes that are dispersed by both wind and water.
๐ซ ๐๐ก๐ฒ ๐๐ญ'๐ฌ ๐ ๐๐ซ๐จ๐๐ฅ๐๐ฆ:
โข Invades floodplains, streambanks, lakeshores, and other moist habitats.
โข Rapidly climbs over trees, shrubs, and native vegetation, reducing sunlight and suppressing plant growth.
โข Seeds are easily spread by wind and water, allowing new infestations to establish quickly.
โข Contact with the plant can cause skin irritation, blisters, and dermatitis.
๐ ๐๐ก๐๐ญ ๐๐จ๐ฎ ๐๐๐ง ๐๐จ:
โข Learn to identify Japanese hops before it produces seeds.
โข Wear gloves and long sleeves when handling the plant to prevent skin irritation.
โข Remove small infestations before they spread, making sure to dispose of plants properly.
โข Report suspected infestations to help prevent further spread.
๐ฑCurrently, there are no reports of Japanese hops in the TIP region. However, the species is present in southeastern Wisconsin, making early detection and reporting important to help prevent the spread.
If you believe you have spotted Japanese hops, let us know!
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