View source for Bolboschoenus maritimus

{{Treatment/ID
|accepted_name=Bolboschoenus maritimus
|accepted_authority=(Linnaeus) Palla in W. D. J. Koch et al.
|publications={{Treatment/Publication
|title=in W. D. J. Koch et al., Syn. Deut. Schweiz. Fl. ed.
|place=3, 3: 2531. 1905
|year=1905
}}
|common_names=Salt-marsh bulrush;alkali bulrush;bayonet-grass;scirpe maritime
|basionyms={{Treatment/ID/Basionym
|name=Scirpus maritimus
|authority=Linnaeus
|publication_title=Sp. Pl.
|publication_place=1: 51. 1753
}}
|synonyms={{Treatment/ID/Synonym
|name=Schoenoplectus maritimus
|authority=(Linnaeus) Lye
}}
|hierarchy=Cyperaceae;Bolboschoenus;Bolboschoenus maritimus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Bolboschoenus]]</div><div class="higher-taxon"><small>species</small>[[Bolboschoenus maritimus]]</div></div>
|volume=Volume 23
|mention_page=page 38, 39, 41, 42, 43, 44
|treatment_page=page 40
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Culms </b>50–150 cm × (1–)3–8 mm. <b>Leaves</b>: sheaths reaching ± to mid culm, fronts usually membranous at mouth, apex concave to convex, veins diverging proximal to summit leaving triangular, veinless area (often disintegrating); widest blade 2–12 mm wide. <b>Inflorescences</b> with all spikelets sessile, simply branched with not more than 1/2 of spikelets solitary or in clusters of 2–10 on 1–4 rays, rays not exceeding 8 cm; involucral bracts that surpass inflorescences 1–4, widest bract 1–6 mm wide. <b>Spikelets</b> (1–)2–40, ovoid to lanceoloid, 7–40 × (4–)7–10 mm, base usually cuneate to rounded; scales often loosely imbricate, bright orange-brown to stramineous, often obscurely lineolate-spotted, 5–8 × 3–4 mm, membranous, translucent, apex acute, 2-fid 0.5–1 mm deep, awn slender, 1–3 × 0.25 mm at base. <b>Flowers</b>: perianth bristles not persistent on shed achenes or sometimes 1–few weakly persistent, medium brown, to 1/2 achene length; anthers yellow, very rarely orange, 2–4 mm; styles 2–3-fid. <b>Achenes</b> medium to dark brown, rarely yellowish or whitish, obovoid, biconvex, or concave-sided, rarely obtusely compressed trigonous, 2.3–4.1 × 1.9–2.8 mm, apex rounded to nearly truncate, beak 0.1–0.4 mm, surface glossy, exocarp (epidermal) cells usually clearly visible at 10–20X; in achene cross section exocarp 2 times as thick as mesocarp, its cells greatly enlarged, at least 3 times deeper than wide; achene specific gravity much less than water.</span><!--

-->{{Treatment/Body
|distribution=North America;Mexico;South America (Argentina;Peru);Eurasia;Africa;Pacific Islands (Hawaii).
|discussion=<p>Subspecies at least 2 (2 in the flora).</p><!--
--><p><i>Bolboschoenus maritimus</i> belongs to a difficult, worldwide complex, in which the delimitation of specific and infraspecific taxa is still unclear. The new lectotype and epitype from the Baltic coast of Sweden selected by S. G. Smith and I. Kukkonen (1999) are used here as the basis for redefining <i>B. maritimus </i>subsp.<i> maritimus</i>, which was previously defined to include B. yagara (Ohwi) Y. C. Yang & M. Zhan (J. Browning et al. 1996; Z. Hroudová et al. 1998).</p><!--
--><p>It seems likely that some populations of both <i>Bolboschoenus maritimus </i>subsp.<i> maritimus</i> and <i>B. maritimus </i>subsp.<i> paludosus</i> have been introduced into the flora from Eurasia.</p><!--
--><p>Putative <i>Bolboschoenus maritimus</i> × <i>B. robustus</i> hybrids are common in zones of sympatry along the northern Atlantic Coast and in California, putative <i>B. fluviatilis</i> × <i>B. maritimus</i> hybrids occur in California, and many <i>B. glaucus</i> × <i>B. maritimus</i> hybrids occur in California and Idaho (J. Browning et al. 1995). They are intermediate between their putative parents in every character studied and are often fertile. Interspecific hybridization is probably responsible for much of the infraspecific variation in <i>B. maritimus</i>, especially along the northern Atlantic and California coasts. The orange anthers and few 3-fid styles on some specimens from southeastern Texas may be due to introgression from <i>B. robustus</i>. The type of <i>Scirpus</i> maritimus forma agonus Fernald is probably a <i>B. maritimus</i> × <i>B. robustus</i> hybrid.</p><!--
--><p><i>Bolboschoenus maritimus</i> and <i>B. robustus</i> have been widely confused in the southwest, where some authors (e.g., H. L. Mason 1957; P. A. Munz 1959, 1968) have treated <i>B. maritimus</i> as a synonym of <i>B. robustus</i>, and others (D. S. Correll and H. B. Correll 1972) have treated <i>B. robustus</i> as <i>B. maritimus</i> <i></i></i>var.<i><i> macrostachyus</i> Michaux.</p><!--
--><p>No acceptably vouchered chromosome counts for <i>Bolboschoenus maritimus</i> are available from North America. The voucher for the 2n = 90 count by N. A. Harriman (1981) from southeastern Texas is a mixed collection of <i>B. maritimus </i>subsp.<i> paludosus</i> and <i>B. robustus</i>. Reasonably reliable chromosome numbers reported for <i>B. maritimus</i> in Europe are mostly 2n = 108 or 110, but vary from 2n = 55 to 112 (V. Jarolímová and Z. Hroudová 1998).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Styles all or mostly 3-fid; achenes obtusely compressed trigonous or some biconvex in same spikelet; scales dark to medium brown; achenes dark to medium brown.
|[[Bolboschoenus maritimus subsp. maritimus|Bolboschoenus maritimus subsp. maritimus]]
|-id=key-0-1
|1
|Styles all or mostly 2-fid; achenes mostly biconvex; scales dark to medium brown to stramineous or nearly colorless; achenes mostly medium brown, sometimes darker or paler.
|[[Bolboschoenus maritimus subsp. paludosus|Bolboschoenus maritimus subsp. paludosus]]
|}
</div></div><!--

-->{{#Taxon:
name=Bolboschoenus maritimus
|author=
|authority=(Linnaeus) Palla in W. D. J. Koch et al.
|rank=species
|parent rank=genus
|synonyms=Schoenoplectus maritimus
|basionyms=Scirpus maritimus
|family=Cyperaceae
|distribution=North America;Mexico;South America (Argentina;Peru);Eurasia;Africa;Pacific Islands (Hawaii).
|reference=None
|publication title=in W. D. J. Koch et al., Syn. Deut. Schweiz. Fl. ed.
|publication year=1905
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V23/V23_55.xml
|genus=Bolboschoenus
|species=Bolboschoenus maritimus
}}<!--

-->[[Category:Treatment]][[Category:Bolboschoenus]]