View source for Sparganium hyperboreum

{{Treatment/ID
|accepted_name=Sparganium hyperboreum
|accepted_authority=Laestadius ex Beurling
|publications={{Treatment/Publication
|title=Wikstrom’s Arberattelse
|place=1850, Bihang 4. 1853 or 1854 Arsberatt. Bot. Arbet. 1853
|year=1853
}}
|common_names=Rubanier hyperboréal
|basionyms=
|synonyms=
|hierarchy=Sparganiaceae;Sparganium;Sparganium hyperboreum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Sparganiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Sparganium]]</div><div class="higher-taxon"><small>species</small>[[Sparganium hyperboreum]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=page 277
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>slender, grasslike, to 0.8 m; leaves and inflorescences usually floating. <b>Leaves</b> limp, unkeeled, flat, 0.1–0.4(–0.8) m × 1–5 mm. <b>Inflorescences</b>: rachis unbranched, flexuous; bracts ascending, lower bracts slightly inflated near base; pistillate heads 1–4, axillary, contiguous, sessile, or most proximal peduncled and supra-axillary, 0.5–1.4 cm diam. in fruit; staminate heads 1(–2), terminal, contiguous or not with distalmost pistillate head. <b>Flowers</b>: tepals without subapical dark spot, erose; stigmas 1, ovate. <b>Fruits</b> brown or yellowish, dull, subsessile, body ellipsoid to obovoid, not faceted, ±more or less constricted at equator, 2–5 × 1.5–2.5 mm; beak less than 0.5 mm, or absent; tepals attached at base, not reaching equator. <b>Seeds</b> 1. <b>2n</b> = 30.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jul–Aug).
|habitat=Cold, quiet, shallow, oligo- to mesotrophic arctic-alpine waters
|elevation=0–3000 m
|distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Yukon;Alaska;circumboreal.
|discussion=<p><i>Sparganium hyperboreum</i> is distinguished from other floating-leaved species by its beakless fruits with sessile stigmas.</p><!--
--><p>Putative hybrids between <i>Sparganium hyperboreum</i> and <i>S. natans</i> have been found in Manitoba, Newfoundland, Northwest Territories, and Alaska by V. L. Harms (1973), who discussed variation in both species. The hybrids have wider (2–5 mm) leaves, golden-brown fruits with short (1 mm) beaks, and supra-axillary pistillate heads (V. L. Harms 1973; C. D. K. Cook and M. S. Nicholls 1986).</p>
|tables=
|references={{Treatment/Reference
|id=beal1977a
|text=Beal, E. O. 1977. A Manual of Marsh and Aquatic Vascular Plants of North Carolina, with Habitat Data. Raleigh. [North Carolina Agric. Exp. Sta. Techn. Bull. 247.]
}}{{Treatment/Reference
|id=brayshaw1985a
|text=Brayshaw, T. C. 1985. Pondweeds and Bur-reeds, and Their Relatives: Aquatic Families of Vascular Plants in British Columbia. Victoria. [Brit. Columbia Prov. Mus., Occas. Pap. 26.]
}}{{Treatment/Reference
|id=cook1985a
|text=Cook, C. D. K. 1985. Sparganium: Some old names and their types. Bot. Jahrb. Syst. 107: 269--276.
}}{{Treatment/Reference
|id=doblies1970b
|text=Müller-Doblies, D. 1970. Taylor, R. L. and G. A. Mulligan. 1968. Flora of the Queen Charlotte Islands. Part 2. Cytological Aspects of the Vascular Plants. Ottawa.
}}{{Treatment/Reference
|id=l1981a
|text=Löve, Á. and D. Löve. 1981. In: IOPB chromosome number reports LXXII. Taxon 30: 694--708.
}}{{Treatment/Reference
|id=larson1993a
|text=Larson, G. E. 1993. Aquatic and Wetland Vascular Plants of the Northern Great Plains. Fort Collins, Colo. [U.S.D.A. Forest Serv., Gen. Techn. Rep. RM-238.]
}}{{Treatment/Reference
|id=mason1957b
|text=Mason, H. L. 1957. A Flora of the Marshes of California. Berkeley.
}}{{Treatment/Reference
|id=voss1966a
|text=Voss, E. G. 1966. Nomenclatural notes on monocots. Rhodora 68: 435--463.
}}
}}<!--

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-->{{#Taxon:
name=Sparganium hyperboreum
|author=
|authority=Laestadius ex Beurling
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Sparganiaceae
|phenology=Flowering summer (Jul–Aug).
|habitat=Cold, quiet, shallow, oligo- to mesotrophic arctic-alpine waters
|elevation=0–3000 m
|distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Yukon;Alaska;circumboreal.
|reference=beal1977a;brayshaw1985a;cook1985a;doblies1970b;l1981a;larson1993a;mason1957b;voss1966a
|publication title=Wikstrom’s Arberattelse
|publication year=1853
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V22/V22_465.xml
|genus=Sparganium
|species=Sparganium hyperboreum
}}<!--

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