View source for Myosurus

{{Treatment/ID
|accepted_name=Myosurus
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=1: 284. 175
}}, {{Treatment/Publication
|title=Gen. Pl. ed.
|place=5, 137. 1754
|year=1754
}}
|common_names=Mousetail
|basionyms=
|synonyms=
|hierarchy=Ranunculaceae;Myosurus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Ranunculaceae]]</div><div class="higher-taxon"><small>genus</small>[[Myosurus]]</div></div>
|etymology=Greek mus, mouse, and oura, tail, from shape and texture of the fruiting head of M. minimus.
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual. <b>Leaves</b> basal, simple, tapering to filiform base. <b>Leaf</b> blade linear or very narrowly oblanceolate, margins entire. <b>Inflorescences</b> terminal, solitary flowers; bracts absent. <b>Flowers</b> bisexual, radially symmetric; sepals not persistent in fruit, (3-)5(-8), green or with scarious margins, spurred, oblong to elliptic, lanceolate, or oblanceolate, 1.5-4 mm; petals 0-5, distinct, white, plane, linear to very narrowly spatulate, long-clawed, 1-2.5 mm; nectary present; stamens 5-25; filaments filiform; staminodes absent between stamens and pistils; pistils 10-400, simple; ovule 1 per pistil; style persistent. <b>Fruits</b> achenes, aggregate, sessile, prismatic, exposed face forming plane outer surface, sides faceted or curved by compression against adjacent achenes; sides not veined; beak terminal, straight, 0.05-1.8 mm. <b>x</b>=8.</span><!--

-->{{Treatment/Body
|distribution=Temperate regions worldwide.
|discussion=<p>Species 15 (5 in the flora).</p><!--
--><p>Mature fruits are crucial to accurate identification of most North American species of <i>Myosurus</i>.</p><!--
--><p>Flowers of <i>Myosurus</i> are unique in the family in that the receptacle continues to elongate and, in some species, to initiate new ovaries after the flowers open and pollen is shed (D.E. Stone 1959).</p>
|tables=
|references={{Treatment/Reference
|id=mason1957a
|text=Mason, H. L. and D. E. Stone. 1957. Myosurus. In: Mason, H. L. 1957. A Flora of the Marshes of California. Berkeley. Pp. 497-505
}}{{Treatment/Reference
|id=stone1959a
|text=Stone, D. E. 1959. A unique balanced breeding system in the vernal pool mouse-tails. Evolution 13: 151-174.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Outer face of achene orbiculate to square or broadly rhombic, 0.8–1.3 times as high as wide.
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Outer face of achene narrowly rhombic to elliptic or oblong to linear, 1.5–5 times as high as wide.
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Outer face of achene bordered by prominent ridge.
|[[Myosurus cupulatus|Myosurus cupulatus]]
|-id=key-0-2
|2
|Outer face of achene not bordered.
|[[Myosurus nitidus|Myosurus nitidus]]
|-id=key-0-3
|3
|Beak of achene 0.05–0.4 mm, 0.05–0.3 times as long as body of achene, parallel to outer face of achene, heads of achenes thus appearing smooth.
|[[Myosurus minimus|Myosurus minimus]]
|-id=key-0-3
|3
|Beak of achene 0.6–1.8 mm, 0.4–1.1 times as long as body of achene, divergent, heads of achenes thus strongly roughened by projecting achene beaks.
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Scapes 0–0.2 cm; heads of achenes immersed in leaves.
|[[Myosurus sessilis|Myosurus sessilis]]
|-id=key-0-4
|4
|Scapes 0.9–10.5 cm; heads of achenes projecting beyond leaves.
|[[Myosurus apetalus|Myosurus apetalus]]
|}
</div></div><!--

-->{{#Taxon:
name=Myosurus
|author=Alan T. Whittemore
|authority=Linnaeus
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Ranunculaceae
|distribution=Temperate regions worldwide.
|reference=mason1957a;stone1959a
|publication title=Sp. Pl.;Gen. Pl. ed.
|publication year=;1754
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_660.xml
|genus=Myosurus
}}<!--

-->[[Category:Treatment]][[Category:Ranunculaceae]]