- Air-Potato
- Dioscorea bulbifera
- Bamboo
- Several non-native genera
- Brazilian Peppertree
- Schinus terebinthifolius
- Callery pear
- Pyrus calleryana
- Chinese Privet
- Ligustrum sinense
- Chinese Tallow Tree
- Triadica sebifera
- Cogongrass
- Imperata cylindrica
- Japanese Climbing Fern
- Lygodium japonicum
- Japanese Stiltgrass
- Microstegium vimineum
- Johnson Grass
- Sorghum halepense
- Kudzu
- Pueraria lobata
- Thorny Olive
- Elaeagnus pungens
- Tree of Heaven
- Ailanthus altissima
Cogongrass
Cogongrass has been named one of the 10 worst weeds in the world. Native to Southeast Asia, cogongrass was introduced to the southeastern U.S. over a century ago and has rapidly invaded disturbed areas across the southeastern U.S., including pastures, fallow fields, forests, and highway and powerline rights-of-way. Seeds are typically wind-dispersed, but the plant can spread vegetatively through rhizomes (roots); these rhizomes can be spread to new places on vehicles and equipment. Cogongrass produces upright stems up to 4’ tall, and usually grows so thick it crowds out competing vegetation. Stems are generally light green with a yellowish color. The midrib of leaves is offset (not in the center of the leaf). Cogongrass flowers early in the growing season (spring), whereas most native grasses flower in summer or fall. Control of cogongrass is difficult, time-consuming, and expensive, involving a combination of mechanical and chemical treatments. There are no known effective biological control methods.
Biology and Control of Cogongrass (Imperata cylindrica) in Southern Forests
UF/IFAS Extension, 2025Cogongrass (Imperata cylindrica) Biology, Ecology, and Management in Florida Grazing Lands
UF/IFAS Extension, 2024Cogongrass (Imperata cylindrica) invasions in the US: Mechanisms, impacts, and threats to biodiversity
University of Florida, 2015Cogongrass biology and management in the southeastern U.S.
University of Florida, Southern Regional Extension Forestry, 2018Cogongrass Management FAQ
Alabama Cooperative Extension System, 2023Field Guide to the Identification of Cogongrass: With Comparisons to Other Look-Alike Species
Alabama A&M and Auburn Universities, 2022Cogongrass management: past, present, and future
University of Florida, 2016Invasive Grasses of the Southeast
Auburn University, 2021Managing Troublesome Invasive Grasses in Eastern Forests
Auburn University, 2014Winter Cogongrass: Identification, Monitoring, and Management
The Longleaf Alliance & Georgia Forestry Commission, 2023Cogongrass
Clemson University , 2021cogongrass.org
http://www.cogongrass.org/Cogongrass: Identifying One of the Most Invasive Plant Species
Georgia Forestry Commission, 2021EDD Maps - Cogongrass
https://www.eddmaps.org/distribution/usstate.cfm?sub=2433