View source for Trichophorum

{{Treatment/ID
|accepted_name=Trichophorum
|accepted_authority=Persoon
|publications={{Treatment/Publication
|title=Syn. Pl.
|place=1: 69. 1805
|year=1805
}}
|common_names=Club-rush;trichophore
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Eriophorella
|authority=Holub
|rank=genus
}}
|hierarchy=Cyperaceae;Trichophorum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Trichophorum]]</div></div>
|etymology=Greek tricho -, hair, and phorum, carrier or stalk
|volume=Volume 23
|mention_page=page 6, 7, 8
|treatment_page=page 28
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, cespitose, rhizomatous or not. <b>Culms</b> trigonous or terete. <b>Leaves</b> basal or subbasal; sheaths bladeless or distal sheaths with blade to 5 mm, not fibrous; ligules present; blades obsolete or elongate, linear, less than 1 cm × 1 mm. <b>Inflorescences</b> terminal; spikelets 1; involucral bracts 1, suberect, scalelike, apex mucronate or awned. <b>Spikelets</b>: scales 3–9, spirally arranged, each subtending flower. <b>Flowers</b> bisexual; perianth of 0–6 bristles, straight, shorter than to about 20 times as long as achene, smooth or scabrous; stamens 3; styles linear, 3-fid, base persistent. <b>Achenes</b> trigonous or plano-convex.</span><!--

-->{{Treatment/Body
|distribution=Circumpolar to circumboreal;North America;Andean and tropical Southeast Asian mountains.
|discussion=<p>Species 9 (6 in the flora).</p><!--
--><p>The appropriate name and typification for this genus have been debated widely. Arguments for conservation of <i>Trichophorum</i> Persoon in the sense used here, with the conserved type, <i>T. alpinum</i> (Linnaeus) Persoon, were presented (M. Salmenkallio and I. Kukkonen 1989), and the proposal was accepted in the Code. The proposal to segregate <i>T. alpinum</i> from the rest of <i>Trichophorum</i>, in the genus Eriophorella (J. Holub 1984), is based on characters that do not justify generic rank. In fact, K. Tan (1985) found that <i>T. pumilum</i> (Vahl) Schinz & Thellung could not be considered generically distinct from <i>T. alpinum</i> and created a combination for it within Eriophorella. The name Baeothryon Ehrhart ex A. Dietrich, previously considered to be a synonym of <i>Trichophorum</i>, has been shown to apply to a section of <i>Eleocharis</i> R. Brown (M. Salmenkallio and I. Kukkonen 1989; M. S. González-Elizondo and P. M. Peterson 1997).</p>
|tables=
|references={{Treatment/Reference
|id=beetle1947a
|text=Beetle, A. A. 1947. Scirpus L. section Baeothryon (A. Dietr.) Reichenb. In: N. L. Britton et al., eds. 1905+. North American Flora…. 47+ vols. New York. Vol. 18, pp. 493–495.
}}{{Treatment/Reference
|id=fernald1943d
|text=Fernald, M. L. 1943b. Studies in North American species of Scirpus. Rhodora 45: 279–296.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Culms terete, smooth.
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Culms trigonous, angles scabrous.
|[[#key-0-4| > 4]]
|-id=key-0-2
|2
|Achenes sharply trigonous; bracts 3.5–7.7 mm, exceeding spikes, apex with awn usually 1 mm or more.
|[[Trichophorum clementis|Trichophorum clementis]]
|-id=key-0-2
|2
|Achenes compressed trigonous to plano-convex; bracts 1.6–4.5 mm, equaling or shorter than spikes, apex mucronate or awn less than 1 mm.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Plants loosely cespitose, long-rhizomatous, slender; bracts to 2.5 mm, apex mucronate; perianth bristles absent; anthers 0.8–1.5 mm.
|[[Trichophorum pumilum|Trichophorum pumilum]]
|-id=key-0-3
|3
|Plants densely cespitose, not rhizomatous; bracts more than 3 mm, apex awned; perianth bristles 6; anthers 1.5–2.6 mm.
|[[Trichophorum cespitosum|Trichophorum cespitosum]]
|-id=key-0-4
|4
|Flowers usually 15 or more per spike; perianth bristles white, flattened, to 20 times longer than achenes, smooth.
|[[Trichophorum alpinum|Trichophorum alpinum]]
|-id=key-0-4
|4
|Flowers fewer than 10 per spike; perianth bristles white to brown, terete, equaling or shorter than achenes, scabrous.
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Scales with obtuse apex, midribs not reaching apices in distal scales; leaves equaling or shorter than culms, 0.5–0.8(–1) mm wide.
|[[Trichophorum clintonii|Trichophorum clintonii]]
|-id=key-0-5
|5
|Scales (most or all) with mucronate apex, midribs excurrent; leaves equaling or exceeding culms, 0.8–2 mm wide.
|[[Trichophorum planifolium|Trichophorum planifolium]]
|}
</div></div><!--

-->{{#Taxon:
name=Trichophorum
|author=William J. Crins
|authority=Persoon
|rank=genus
|parent rank=family
|synonyms=Eriophorella
|basionyms=
|family=Cyperaceae
|illustrator=John Myers
|illustration copyright=Flora of North America Association
|distribution=Circumpolar to circumboreal;North America;Andean and tropical Southeast Asian mountains.
|reference=beetle1947a;fernald1943d
|publication title=Syn. Pl.
|publication year=1805
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_37.xml
|genus=Trichophorum
}}<!--

-->[[Category:Treatment]][[Category:Cyperaceae]]