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-d0_s0" data-properties="herb duration"><b>Herbs,</b> annual.</span> <span class="statement" id="st-d0_s1" data-properties="leaf position;leaf architecture;leaf shape;leaf shape;leaf shape"><b>Leaves </b>basal, simple, tapering to filiform base.</span> <span class="statement" id="st-d0_s2" data-properties="leaf-blade arrangement or course or shape;leaf-blade shape;margin architecture or shape"><b>Leaf-</b>blade linear or very narrowly oblanceolate, margins entire.</span> <span class="statement" id="st-d0_s3" data-properties="inflorescence position or structure subtype;flower architecture or arrangement or growth form"><b>Inflorescences </b>terminal, solitary flowers;</span> <span class="statement" id="st-d0_s4" data-properties="beak presence">bracts absent.</span> <span class="statement" id="st-d0_s5" data-properties="flower reproduction;flower architecture or shape"><b>Flowers </b>bisexual, radially symmetric;</span> <span class="statement" id="st-d0_s6" data-properties="sepal duration;sepal coloration;sepal coloration;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal shape;sepal some measurement;fruit atypical quantity;fruit atypical quantity;fruit quantity;margin texture">sepals not persistent in fruit, (3-) 5 (-8), green or with scarious margins, spurred, oblong to elliptic, lanceolate, or oblanceolate, 1.5-4 mm;</span> <span class="statement" id="st-d0_s7" data-properties="petal quantity;petal shape;petal shape;petal shape;petal some measurement;petal fusion;petal coloration;petal shape;petal shape">petals 0-5, distinct, white, plane, linear to very narrowly spatulate, long-clawed, 1-2.5 mm;</span> <span class="statement" id="st-d0_s8" data-properties="nectary presence">nectary present;</span> <span class="statement" id="st-d0_s9" data-properties="stamen quantity">stamens 5-25;</span> <span class="statement" id="st-d0_s10" data-properties="filament shape">filaments filiform;</span> <span class="statement" id="st-d0_s11" data-properties="staminode presence">staminodes absent between stamens and pistils;</span> <span class="statement" id="st-d0_s12" data-properties="pistil quantity;pistil architecture">pistils 10-400, simple;</span> <span class="statement" id="st-d0_s13" data-properties="ovule quantity">ovule 1 per pistil;</span> <span class="statement" id="st-d0_s14" data-properties="style duration">style persistent.</span> <span class="statement" id="st-d0_s15" data-properties="fruits achene architecture;fruits achene architecture;fruits achene shape;face prominence;outer surface shape;side shape;side course;achene arrangement"><b>Fruits </b>achenes, aggregate, sessile, prismatic, exposed face forming plane outer surface, sides faceted or curved by compression against adjacent achenes;</span> <span class="statement" id="st-d0_s16" data-properties="side architecture">sides not veined;</span> <span class="statement" id="st-d0_s17" data-properties="beak position or structure subtype;beak course;beak some measurement;x chromosome quantity">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 Myosurus.</p><!--
--><p>Flowers of Myosurus 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://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_660.xml
|genus=Myosurus
|achene arrangement=adjacent
|beak course=straight
|beak position or structure subtype=terminal
|beak presence=absent
|beak some measurement=0.05mm;1.8mm
|face prominence=exposed
|filament shape=filiform
|flower architecture or arrangement or growth form=solitary
|flower architecture or shape=symmetric
|flower reproduction=bisexual
|fruit atypical quantity=5;8
|fruit quantity=5
|fruits achene architecture=sessile;aggregate
|fruits achene shape=prismatic
|herb duration=annual
|inflorescence position or structure subtype=terminal
|leaf architecture=simple
|leaf position=basal
|leaf shape=tapering;filiform
|leaf-blade arrangement or course or shape=linear
|leaf-blade shape=oblanceolate
|margin architecture or shape=entire
|margin texture=scarious
|nectary presence=absent
|outer surface shape=plane
|ovule quantity=1
|petal coloration=white
|petal fusion=distinct
|petal quantity=0;5
|petal shape=linear to very;plane;long-clawed;spatulate;linear to very
|petal some measurement=1mm;2.5mm
|pistil architecture=simple
|pistil quantity=10;400
|sepal coloration=with scarious margins;green
|sepal duration=not persistent
|sepal shape=oblong;elliptic lanceolate or oblanceolate
|sepal some measurement=1.5mm;4mm
|side architecture=not veined
|side course=curved
|side shape=faceted
|stamen quantity=5;25
|staminode presence=absent
|style duration=persistent
|x chromosome quantity=8
}}<!--

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