Selected images for old world climbing fern (Lygodium microphyllum )
Old world climbing fern, an aggressive invader in southern Florida, is a perennial climbing fern that can reach lengths of more than 90 ft. (30 m). Vines are thin, wiry, and remain green throughout winter. The fronds (leaves of a fern) are opposite, singly compound, 2-5 in. (5-12 cm) long with thick, usually unlobed leaflets. Fertile fronds have lobes around the margin, where sporangia are covered with rolled leaf tissue. Old world climbing fern is a serious invader of swamps, glades, and hammocks. It can form dense mats that smother understory vegetation, shrubs and trees. Old word climbing fern also increases fire risks. Thick mats of dead fronds that grow into trees act as fire ladders, bringing the fires into the tree canopies. Old world climbing fern is native to Africa, Australia and Southeast Asia and was first found naturalized in the United States in 1965.
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 5275065 old world climbing fern Lygodium microphyllum Infestation Tony Pernas |
 2308086 old world climbing fern Lygodium microphyllum Foliage Peggy Greb |
 1461114 old world climbing fern Lygodium microphyllum Foliage Amy Ferriter |
 1461108 old world climbing fern Lygodium microphyllum Seedling(s) Amy Ferriter |
 1461085 old world climbing fern Lygodium microphyllum Control Amy Ferriter |
 1461100 old world climbing fern Lygodium microphyllum Control Amy Ferriter |
 2308087 old world climbing fern Lygodium microphyllum Infestation Peggy Greb |
 2308088 old world climbing fern Lygodium microphyllum Infestation Peggy Greb |
 5275066 old world climbing fern Lygodium microphyllum Infestation Tony Pernas |
 5275079 old world climbing fern Lygodium microphyllum Control Tony Pernas |
 5276001 old world climbing fern Lygodium microphyllum Infestation Tony Pernas |
 5276003 old world climbing fern Lygodium microphyllum Infestation Tony Pernas |
 5276012 old world climbing fern Lygodium microphyllum Infestation Tony Pernas |
 5276014 old world climbing fern Lygodium microphyllum Infestation Tony Pernas |
 1461115 old world climbing fern Lygodium microphyllum Control Amy Ferriter |
 1461161 old world climbing fern Lygodium microphyllum Prescribed Fire Amy Ferriter |
