Carex unilateralis
{{Short description|Species of grass-like plant in the sedge family}}
{{Speciesbox
| image = Carex unilateralis.jpg
| status = LC
| status_system = IUCN3.1
| genus = Carex
| display_parents = 2
| parent = Carex sect. Ovales
| species = unilateralis
| authority = Mack.
| synonyms = Carex athrostachya var. unilateralis (Mack.) B.Boivin
}}
Carex unilateralis, the lateral sedge,{{PLANTS|id=CAUN3|taxon=Carex unilateralis|accessdate=27 September 2018}} is a species of sedge that was first described by Kenneth Mackenzie in 1922.{{cite web
| url = http://www.theplantlist.org/tpl/record/kew-231824
| title = Carex unilateralis
| publisher = The Plant List
| year = 2010
| accessdate = 6 December 2014
}} The specific epithet, {{lang|la|unilateralis}}, is derived from Latin and means "one-sided".{{cite book
| last1 = Damrosch
| first1 = Barbara
| authorlink1 = Barbara Damrosch
| last2 = Neal
| first2 = Bill
| title = Gardener's Latin: A Lexicon
| publisher = Algonquin Books
| location = Chapel Hill, N.C
| year = 2003
| isbn = 978-1-56512-743-2
| oclc = 856021571
| url = https://books.google.com/books?id=-fhjAAAAQBAJ&pg=PA129
| access-date = 21 April 2019
| page = 129
}}
Description
Carex unilateralis is a low-growing, perennial, tussock-forming rhizomatous plant with a compact flower head.{{Cite web |title=OregonFlora |url=https://oregonflora.org/taxa/garden.php?taxon=3813 |access-date=2025-01-13 |website=oregonflora.org}} Bracts grow from 35–75 cm in height, and exceed the leaves in length.{{Cite web |title=E-Flora BC Atlas Page |url=https://linnet.geog.ubc.ca/Atlas/Atlas.aspx?sciname=Carex+unilateralis |access-date=2025-01-13 |website=linnet.geog.ubc.ca}} Leaves measure 2–3 mm in width. Inflorescence is generally angled to one side of the culm, making this species relatively easy to identify.{{Cite web |title=OregonFlora |url=https://oregonflora.org/taxa/index.php?taxon=3813 |access-date=2025-01-13 |website=oregonflora.org}}
Distribution and habitat
Carex unilateralis is common throughout southwestern Canada and the western USA.{{Cite web |title=Carex unilateralis Mack. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:47341-2 |access-date=2025-01-13 |website=Plants of the World Online |language=en}} It prefers lowland, damp regions such as bogs, marshes and wetlands.