Juncus compressus is a species of flowering plant in the rush family, Juncaceae.[1] It is native to temperate Eurasia.Juncus compressus is easy to confuse with J. gerardii.
About 80 cm in height. Rhizomes are short-creeping or densely branching. There are 1-3 cataphylls, and 1-2 leaves. The leaf blade is flat to slightly channeled, measuring 5–35 cm long and 0.8–2 mm wide. Inflorescences consist of 5-60 flowers. Flowers have six stamens, with filaments measuring 0.5-0.7 mm and anthers 0.6–1 mm. Seed capsules are brown.
Juncus compressus prefers calcareous wetlands and is often associated with disturbed habitats, such as ditches, roadsides, railroads, and canal banks.[2]
The plant is considered an invasive species in the United States of America.
| IL | 1982 | |
| IN | 1987 | |
| MI | 1980 | |
| NY | 1895 | |
| WI | 1974 |