View source for Lescuraea

{{Treatment/ID
|accepted_name=Lescuraea
|accepted_authority=Schimper in P. Bruch and W. P. Schimper
|publications={{Treatment/Publication
|title=in P. Bruch and W. P. Schimper, Bryol. Europ.
|place=5: 101, plate 459. 1851
|year=1851
}}
|basionyms=
|synonyms=
|hierarchy=Leskeaceae;Lescuraea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Leskeaceae]]</div><div class="higher-taxon"><small>genus</small>[[Lescuraea]]</div></div>
|etymology=For Charles Léo Lesquereux, 1806 – 1889, Swiss-American bryologist and paleontol o gist
|volume=Volume 28
|mention_page=page 341, 356, 648, 652
|treatment_page=page 348
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism size;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism growth form;mat width"><b>Plants </b>small to medium-sized, in thin mats, yellow-green, gold-green, or green.</span> <span class="statement" id="st-d0_s1" data-properties="stem architecture"><b>Stems </b>irregularly branched;</span> <span class="statement" id="st-d0_s2" data-properties="paraphyllium quantity;paraphyllium architecture;branch quantity;stem texture;cell architecture or pubescence or relief;cell architecture or pubescence or relief">paraphyllia many on branches, few on stems, filamentous to foliose, cells smooth or prorulose;</span> <span class="statement" id="st-d0_s3" data-properties="base arrangement;base orientation">rhizoids in clusters arising from base of stem-leaves.</span> <span class="statement" id="st-d0_s4" data-properties=""><b>Stem </b>and branch leaves similar.</span> <span class="statement" id="st-d0_s5" data-properties="stem-leaf fixation or orientation;stem-leaf architecture or shape;stem-leaf orientation;stem-leaf shape;stem-leaf architecture or arrangement or shape or vernation"><b>Stem-</b>leaves appressed to julaceous when dry, erect-spreading when moist, ovatelanceolate to lanceolate, strongly plicate proximally;</span> <span class="statement" id="st-d0_s6" data-properties="margin orientation;margin architecture or shape;limbidium presence">margins recurved proximally, serrate distally, limbidium absent;</span> <span class="statement" id="st-d0_s7" data-properties="apex shape;hairpoint presence">apex abruptly to gradually acuminate, hairpoint absent;</span> <span class="statement" id="st-d0_s8" data-properties="costa quantity;costa quantity">costa single, 2/3 leaf length to subpercurrent, opaque, not sinuate;</span> <span class="statement" id="st-d0_s9" data-properties="leaf length;leaf coloration;leaf shape;cell shape">alar cells quadrate to short-rectangular;</span> <span class="statement" id="st-d0_s10" data-properties="proximal laminal cell shape;proximal laminal cell shape;proximal laminal cell quantity;proximal laminal cell quantity;wall relief">proximal laminal cells elongate, linear-fusiform, more than 3: 1, walls somewhat pitted;</span> <span class="statement" id="st-d0_s11" data-properties="medial cell shape;medial cell quantity;medial cell quantity;medial cell architecture or pubescence or relief;medial cell architecture or pubescence or relief">medial cells linear-fusiform, 4–8: 1, smooth or occasionally prorulose, walls thin.</span> <span class="statement" id="st-d0_s12" data-properties=""><b>Specialized </b>asexual reproduction absent.</span> <span class="statement" id="st-d0_s13" data-properties="wall width;wall development;wall reproduction;wall presence;wall reproduction;wall reproduction"><b>Sexual </b>condition dioicous;</span> <span class="statement" id="st-d0_s14" data-properties="perichaetial leaf coloration;perichaetial leaf orientation;perichaetial leaf length or size;apex shape;costa height or length or size">perichaetial leaves pale translucent, squarrose when moist, longer, apex more acuminate, costa short.</span> <span class="statement" id="st-d0_s15" data-properties="seta some measurement"><b>Seta </b>0.4–1.6 cm.</span> <span class="statement" id="st-d0_s16" data-properties="capsule orientation;capsule shape;capsule architecture or shape"><b>Capsule </b>erect, ovate to cylindric, symmetric;</span> <span class="statement" id="st-d0_s17" data-properties="annulus presence">annulus absent;</span> <span class="statement" id="st-d0_s18" data-properties="operculum shape">operculum conic;</span> <span class="statement" id="st-d0_s19" data-properties="peristome size">peristome strongly reduced;</span> <span class="statement" id="st-d0_s20" data-properties="exostome tooth shape;exostome tooth shape;exostome tooth relief">exostome teeth lanceolate or linear-lanceolate, papillose;</span> <span class="statement" id="st-d0_s21" data-properties="basal membrane position;segment shape;cilium presence">endostome basal membrane low, segments slenderly lanceolate to filiform, cilia absent.</span> <span class="statement" id="st-d0_s22" data-properties="spore some measurement;spore relief"><b>Spores </b>14–22 µm, coarsely papillose.</span><!--

-->{{Treatment/Body
|distribution=North America;Eurasia
|discussion=<p>Species 4 (1 in the flora).</p><!--
--><p>Lescuraea is found mostly in montane to arctic-alpine regions. The four genera Lescuraea, Pseudoleskea, Ptychodium Schimper, and Rigodiadelphus Dixon form the core group of the family Pseudoleskeaceae Schimper, but the relationships among them have not been worked out. In the broad sense, Lescuraea has generally included as synonyms both Pseudoleskea and Ptychodium; most European workers recognize the latter genus. Also, Rigodiadelphus is related to these three genera, and is probably closest to Pseudoleskea. If Rigodiadelphus is accepted, then it makes sense to segregate Pseudoleskea as well. Otherwise this would make Lescuraea in the broad sense paraphyletic. Lescuraea is here treated in the strict sense, excluding Pseudoleskea, based on numerous differences in leaf and capsule characters. J. R. Rohrer (1986) provided a useful comparison of differences among the genera.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Lescuraea
|author=John R. Spence
|authority=Schimper in P. Bruch and W. P. Schimper
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Leskeaceae
|distribution=North America;Eurasia
|reference=None
|publication title=in P. Bruch and W. P. Schimper, Bryol. Europ.
|publication year=1851
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V28/V28_541.xml
|genus=Lescuraea
|annulus presence=absent
|apex shape=acuminate;acuminate
|basal membrane position=low
|base arrangement=cluster
|base orientation=arising
|branch quantity=few
|capsule architecture or shape=symmetric
|capsule orientation=erect
|capsule shape=ovate;cylindric
|cell architecture or pubescence or relief=prorulose;smooth
|cell shape=quadrate;short-rectangular
|cilium presence=absent
|costa height or length or size=short
|costa quantity=2/3;single
|exostome tooth relief=papillose
|exostome tooth shape=linear-lanceolate;lanceolate
|hairpoint presence=absent
|leaf coloration=opaque
|leaf length=subpercurrent
|leaf shape=not sinuate
|limbidium presence=absent
|margin architecture or shape=serrate
|margin orientation=recurved
|mat width=thin
|medial cell architecture or pubescence or relief=occasionally;smooth
|medial cell quantity=1;4;8
|medial cell shape=linear-fusiform
|operculum shape=conic
|paraphyllium architecture=foliose
|paraphyllium quantity=many
|perichaetial leaf coloration=pale translucent
|perichaetial leaf length or size=longer
|perichaetial leaf orientation=squarrose
|peristome size=reduced
|proximal laminal cell quantity=1
|proximal laminal cell shape=linear-fusiform;elongate
|segment shape=slenderly lanceolate;filiform
|seta some measurement=0.4cm;1.6cm
|spore relief=papillose
|spore some measurement=14um;22um
|stem architecture=branched
|stem texture=filamentous
|stem-leaf architecture or arrangement or shape or vernation=plicate
|stem-leaf architecture or shape=julaceous
|stem-leaf fixation or orientation=appressed
|stem-leaf orientation=erect-spreading
|stem-leaf shape=ovatelanceolate;lanceolate
|wall development=specialized
|wall presence=absent
|wall relief=pitted
|wall reproduction=dioicous;sexual;asexual
|wall width=thin
|whole_organism coloration=green;gold-green;green;gold-green;yellow-green
|whole_organism growth form=plant
|whole_organism size=small;medium-sized
}}<!--

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