Biology:Carex retrorsa
| Carex retrorsa | |
|---|---|
| |
| Seedheads remain on plant into winter, providing ornamental value | |
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| Growing in nursery flats | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Clade: | Commelinids |
| Order: | Poales |
| Family: | Cyperaceae |
| Genus: | Carex |
| Species: | C. retrorsa
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| Binomial name | |
| Carex retrorsa | |
| Synonyms[1] | |
|
List
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Carex retrorsa, (commonly known as knotsheath sedge, deflexed bottlebrush sedge, or retrorse sedge), is a widespread species of flowering plant in the family Cyperaceae, native to southern Canada and the northern United States.[1][2]
Description
Carex retrorsa is a clump-forming, rhizomatous sedge. Leaves are bright green and smooth. Basal sheaths are generally brown to purple in colour, often splitting into a ladder shape. Inflorescence consists of multiple spikes, with the terminal spike all-staminate. Bracts are shorter than the lowest pistillate spike. Perigynia are hairless, beaked and toothed, and achenes are triangular in cross-section.[3]
Fruit develops in late spring to summer. Pistillate spikes form clusters of seeds. Each pistillate spike contains 20 to 150 achenes.[3]
Distribution and habitat
Carex retrorsa thrives in stream and lake shores, marshes, swamps, water meadows and alongside waterways.[4] Preferring wet areas and tolerant of some shade, it is available from speciality nurseries for such uses as ecological restoration projects, erosion control, and rain gardens.[5][6]
References
- ↑ 1.0 1.1 "Carex retrorsa Schwein." (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/324496-2.
- ↑ Quattrocchi, Umberto (2012). CRC World Dictionary of Medicinal and Poisonous Plants: Common Names, Scientific Names, Eponyms, Synonyms, and Etymology. CRC Press. p. 816. ISBN 9781482250640.
- ↑ 3.0 3.1 "Carex retrorsa (Retrorse Sedge): Minnesota Wildflowers" (in en). https://www.minnesotawildflowers.info/grass-sedge-rush/retrorse-sedge.
- ↑ "Carex retrorsa (retrorse sedge): Go Botany". https://gobotany.nativeplanttrust.org/species/carex/retrorsa/.
- ↑ Baskin, Carol C. (2003). "Propagation protocol for production of container (plug) Carex retrorsa Schwein. plants, University of Kentucky Lexington, Kentucky.". US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.. https://rngr.net/npn/propagation/protocols/cyperaceae-carex-2504.
- ↑ "Common Name: Retrorse Sedge". North American Native Plant Society. 2017. https://nanps.org/product/carex-retrorsa/#.
Wikidata ☰ Q15581403 entry
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