NC INVASIVE PLANT COUNCIL
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Old World Climbing Fern

Lygodium microphyllum

Old world climbing fern has aggressively invaded the wetlands and hammocks (hardwood forests with deep soils) of Florida and is threatening habitats in the Gulf States. It is considered a problem weed in North Carolina. The fronds of the fern can climb up to 90’ by twining around trees, shrubs, and across the ground. They can covers trees, and are especially a problem in bottomland swamp forests. Groups of leaflets (referred to as ‘pinnae’) grow from the frond oppositely arranged and are about 2 – 5” long. The pinnae are further subdivided into several pairs of leaflets (i.e., pinnules). The pinnules are fringed with rolled-up leaf tissue which covers the sori.

Fact Sheet: Old World Climbing Fern  
Picture
Fronds: non-reproductive on the left, reproductive on the right. 
Photo credit: Peggy Greb, USDA Agricultural Research Service, Bugwood.org
Picture
Photo Credit:  Amy Ferriter
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  • Home
  • About
    • Donate
    • Invasives 101
    • Membership
    • Board of Directors >
      • NC-IPC ByLaws
    • Contact
    • Listserve
  • News
    • Iverson Scholarship
    • Wildland Weeds Magazine
    • Calendar >
      • 2018 Workshop
  • NC Invasive Plants
    • Ailanthus Altissima (Tree-of-Heaven)
    • Elaeagnus umbellata (Autumn Olive)
    • Ficaria verna (Fig Buttercup)
    • Imperata cylindrica (Cogongrass)
    • Ligustrum sinense (Chinese Privet)
    • Ligustrum vulgare (Wild Privet)
    • Lonicera japonica (Japanese Honeysuckle)
    • Microstegium vimineum (Japanese Stilt Grass)
    • Nandina domestica
    • Nymphoides indica (water snowflake)
    • Paulownia tomentosa (Princess Tree)
    • Persicaria perfoliata (Mile-A-Minute Vine)
    • Pueraria montana (Kudzu)
    • Pyrus calleryana (Bradford Pear)
  • Annual Symposiums
    • 2022 Joint Symposium >
      • 2022 Speaker Presentations
    • 2021 Virtual Conference
    • 2019 Joint Symposium >
      • 2019 Presentations
    • 2018 Annual Symposium
    • 2017 Annual Symposium
    • 2016 Annual Symposium >
      • 2016 agenda
    • 2015 Annual Symposium >
      • 2015 Presentations
      • 2015 Agenda
  • Projects
    • Fig Buttercup Project
    • Eno River Hydrilla Project
    • Awareness Week
  • Awards
    • 2015 Student Competition Winners
    • 2015 EIA Award
    • 2014 EIA Award