''Carex hirta'', the hairy sedge or hammer sedge, is a species of

sedge The Cyperaceae () are a family of graminoid (grass-like), monocotyledonous flowering plants known as wikt:sedge, sedges. The family (biology), family is large; botanists have species description, described some 5,500 known species in about 90 ...

native across

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

. It has characteristic hairy leaves and

inflorescence In botany, an inflorescence is a group or cluster of flowers arranged on a plant's Plant stem, stem that is composed of a main branch or a system of branches. An inflorescence is categorized on the basis of the arrangement of flowers on a mai ...

s, and is the

type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...

of the genus ''

Carex ''Carex'' is a vast genus of over 2,000 species of grass-like plants in the family (biology), family Cyperaceae, commonly known as sedges (or seg, in older books). Other members of the family Cyperaceae are also called sedges, however those of ge ...

''.

Description

''Carex hirta'' grows tall, with

leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, ...

long and (occasionally up to ) wide. The stems are trigonous (roughly triangular in cross-section), but with convex, rounded faces. The leaves, leaf sheaths and

ligule A ligule (from "strap", variant of ''lingula'', from ''lingua'' "tongue") is a thin outgrowth at the junction of leaf A leaf (: leaves) is a principal appendage of the plant stem, stem of a vascular plant, usually borne laterally above g ...

s are all hairy, although plants growing in wetter positions may be less hairy; these have sometimes been separated as ''C. hirta'' var. ''sublaevis'' by

Jens Wilken Hornemann Jens Wilken Hornemann (6 March 1770 – 30 July 1841) was a Danish botanist. Biography He was a lecturer at the University of Copenhagen Botanical Garden from 1801. After the death of Martin Vahl in 1804, the task of publishing the Flora Danica ...

, but this may not be a worthwhile taxon. The culms bear 2–3 lateral female

spikes The SPIKES protocol is a method used in clinical medicine to break bad news to patients and families. As receiving bad news can cause distress and anxiety, clinicians need to deliver the news carefully. Using the SPIKES method for introducing and ...

, each long, and on half-ensheathed peduncles up to twice the length of the spike. There are 2–3 male spikes at the end of the culm, each long. The hairy utricles, male

glume In botany, a glume is a bract (leaf-like structure) below a spikelet in the inflorescence (flower cluster) of grass Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family (biology), family of monocotyledonous flow ...

s and leaves make it hard to confuse ''Carex hirta'' with any other ''

'' species.

Distribution

''Carex hirta'' is native to

, and is found across the

British Isles The British Isles are an archipelago in the Atlantic Ocean, North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner Hebrides, Inner and Outer Hebr ...

, albeit with records becoming very scarce in the far north. It has been introduced to North America. It was first recorded in

Amherst, Massachusetts Amherst () is a city in Hampshire County, Massachusetts, United States, in the Connecticut River valley. Amherst has a council–manager form of government, and is considered a city under Massachusetts state law. Amherst is one of several Massach ...

in 1877, and has since been found across much of the eastern

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

and

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

Nomenclature

''Carex hirta'' is the

of the genus ''

'', and therefore also of the subgenus ''Carex'' and the

section Section, Sectioning, or Sectioned may refer to: Arts, entertainment and media * Section (music), a complete, but not independent, musical idea * Section (typography), a subdivision, especially of a chapter, in books and documents ** Section sig ...

''Carex''. It was described by

Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...

in his 1753 ''

Species Plantarum ' (Latin for "The Species of Plants") is a book by Carl Linnaeus, originally published in 1753, which lists every species of plant known at the time, classified into genus, genera. It is the first work to consistently apply binomial nomenclature ...

'', and the

lectotype In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to anchor or centralizes ...

, from the

herbarium A herbarium (plural: herbaria) is a collection of preserved plant biological specimen, specimens and associated data used for scientific study. The specimens may be whole plants or plant parts; these will usually be in dried form mounted on a sh ...

of Adriaan van Royen, was designated by Ilkka Kukkonen in 1992.

References

{{Taxonbar, from=Q158312

hirta Hirta () is the largest island in the St Kilda archipelago, on the western edge of Scotland. The names (in Scottish Gaelic) and ''Hirta'' (historically in English) have also been applied to the entire archipelago. Now without a permanent resi ...

Flora of Europe Flora of Northern America Plants described in 1753 Taxa named by Carl Linnaeus