''Carex inversa'', commonly known as knob sedge, is a species of

sedge The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' wit ...

of the family

Cyperaceae The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' w ...

that is native to parts of

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

and

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

and has also been introduced into

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

Description

The

monoecious Monoecy (; adj. monoecious ) is a sexual system in seed plants where separate male and female cones or flowers are present on the same plant. It is a monomorphic sexual system alongside gynomonoecy, andromonoecy and trimonoecy. Monoecy is conne ...

and rhizomatous perennial grass-like sedge has a tufted habit and typically grows to a height of . It blooms between September and October producing brown flowers. The plant has a reasonably long rhizome with shoots that are loosely tufted. The smooth and erect culms have a circular cross-section and are usually in length. The length of the leaves is usually less than that of the culms and have a blade with a width of and are surrounded by dark brown coloured sheaths.

Taxonomy

The species was described by Robert Brown in 1810 as a part of the work '' Prodromus Florae Novae Hollandiae et Insulae Van Diemen'' from specimens collected from his time in Australia between 1801 and 1806. There are ten

synonyms A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...

for this species including; ''Carex inversa'' var. ''leichardtii'', ''Carex inversa'' var. ''major'', ''Carex inversa'' var. ''minor'', ''Carex rhytidocarpa'' and ''Vignea inversa''.

Distribution

It is native to parts of Australia, and is often found in winter wet depressions and along creek and rivers throughout a large area through the Wheatbelt, Peel,

South West The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each sepa ...

and Great Southern regions of

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

where it grows in sandy-clay-loam soils. It is also found in south eastern parts of

South Australia South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories ...

and southern and eastern parts of

extending north into coastal areas of

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

and

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

. The grass also occurs on

Norfolk Island Norfolk Island (, ; Norfuk: ''Norf'k Ailen'') is an external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia, directly east of Australia's Evans Head and about from Lord Howe Island. Together with ...

. The plant is also commonly found in

and is regarded as non endemic.

References

{{Taxonbar, from=Q2938529 inversa Plants described in 1810 Flora of Western Australia Taxa named by Robert Brown (botanist, born 1773) Flora of South Australia Flora of Victoria (state) Flora of New South Wales Flora of Queensland Flora of the North Island Flora of Norfolk Island

Description

Taxonomy

Distribution

See also

References