View source for Pylaisia

{{Treatment/ID
|accepted_name=Pylaisia
|accepted_authority=Schimper in P. Bruch and W. P. Schimper
|publications={{Treatment/Publication
|title=P. Bruch and W. P. Schimper, Bryol. Europ.
|place=5: 87, plate 455. 1851
|year=1851
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Pylaisiella
|authority=Kindberg ex Grout
|rank=genus
}}
|hierarchy=Hypnaceae;Pylaisia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hypnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pylaisia]]</div></div>
|etymology=For Auguste Jean Marie Bachelot de la Pylaie, 1786–1856, French bryologist
|volume=Volume 28
|mention_page=page 516, 558, 564, 574, 644
|treatment_page=page 563
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism size;whole_organism coloration;whole_organism reflectance;whole_organism growth form;mat position"><b>Plants </b>small, in low mats, yellowish to whitish, shiny.</span> <span class="statement" id="st-d0_s1" data-properties="stem growth form or orientation;stem architecture or shape;branch shape"><b>Stems </b>creeping, regularly or irregularly pinnate, branches usually strongly curled when dry;</span> <span class="statement" id="st-d0_s2" data-properties="hyalodermi presence;central strand presence;central strand size">hyalodermis absent, central strand present, small;</span> <span class="statement" id="st-d0_s3" data-properties="pseudoparaphyllium architecture">pseudoparaphyllia foliose.</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 orientation;stem-leaf shape;stem-leaf width;stem-leaf architecture or arrangement or shape or vernation"><b>Stem-</b>leaves appressed when dry, erect-spreading when moist, ovatelanceolate, widest beyond base, not or slightly plicate;</span> <span class="statement" id="st-d0_s6" data-properties="base shape">base not or weakly decurrent;</span> <span class="statement" id="st-d0_s7" data-properties="margin shape;margin shape or vernation;margin shape">margins plane, sometimes slightly involute distally, subentire to serrulate distally;</span> <span class="statement" id="st-d0_s8" data-properties="apex shape">apex acuminate;</span> <span class="statement" id="st-d0_s9" data-properties="">costa double and short or indistinct;</span> <span class="statement" id="st-d0_s10" data-properties="costa height or length or size;costa prominence;cell variability;cell shape">alar cells differentiated, subquadrate to rectangular;</span> <span class="statement" id="st-d0_s11" data-properties="laminal cell architecture or pubescence or relief">laminal cells smooth;</span> <span class="statement" id="st-d0_s12" data-properties="distal cell quantity;distal cell quantity">distal cells usually longer than 6: 1.</span> <span class="statement" id="st-d0_s13" data-properties=""><b>Branch </b>leaves narrowly ovate to oblong-lanceolate, smaller to occasionally somewhat larger than stem-leaves.</span> <span class="statement" id="st-d0_s14" data-properties=""><b>Specialized </b>asexual reproduction absent.</span> <span class="statement" id="st-d0_s15" data-properties="branch leaf shape;branch leaf size;branch leaf size;branch leaf development;branch leaf reproduction;branch leaf presence;branch leaf reproduction;branch leaf reproduction"><b>Sexual </b>condition autoicous;</span> <span class="statement" id="st-d0_s16" data-properties="inner perichaetial leaf orientation;inner perichaetial leaf shape;apex shape">inner perichaetial leaves erect, oblong-lanceolate, apex subulate.</span> <span class="statement" id="st-d0_s17" data-properties="seta coloration;seta coloration"><b>Seta </b>yellowish or reddish.</span> <span class="statement" id="st-d0_s18" data-properties="capsule orientation;capsule shape;capsule course;capsule condition or size"><b>Capsule </b>erect to suberect, oblong-cylindric to oblong-ovoid, straight, not contracted below mouth;</span> <span class="statement" id="st-d0_s19" data-properties="annulus variability;annulus variability">annulus differentiated or not;</span> <span class="statement" id="st-d0_s20" data-properties="operculum shape;operculum height or length or size;operculum shape;operculum shape">operculum conic to rostrate, obliquely short to long-acute or obtuse;</span> <span class="statement" id="st-d0_s21" data-properties="peristome architecture;peristome size;peristome architecture">peristome perfect to reduced, hygroscopic;</span> <span class="statement" id="st-d0_s22" data-properties="exostome tooth relief;external surface architecture or pubescence or relief">exostome teeth with external surface smooth basally, sometimes roughly papillose distally;</span> <span class="statement" id="st-d0_s23" data-properties="basal membrane presence;segment shape;segment prominence;segment shape;cilium prominence">endostome basal membrane present, segments sometimes 2-fid or fragmentary, keeled, cilia rudimentary.</span> <span class="statement" id="st-d0_s24" data-properties="calyptra architecture"><b>Calyptra </b>naked.</span> <span class="statement" id="st-d0_s25" data-properties="spore shape;spore relief"><b>Spores </b>spheric [somewhat tetrapozoidal by endosporic protonemata], finely papillose.</span><!--

-->{{Treatment/Body
|distribution=North America;Mexico;Central America;South America (Andes Mountains);Europe;Asia
|discussion=<p>Species 16 (4 in the flora).</p><!--
--><p>Pylaisia has yellowish brown stems 2 cm long and reddish capsules; the exothecial cell walls are thin. The setae are sinistrorse-twisted basally and dextrorse-twisted distally when dry; the capsules have few phaneropore stomata on the base of the neck; and the exostome teeth are lance-subulate to blunt, distinctly lamellate, and internally trabeculate.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Endostome free, segments neither 2-fid nor perforate; spores usually smaller than 16 µm; stem leaves usually longer than 1.3 mm
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Endostome wholly or partially adherent to exostome teeth, segments split, 2-fid; spores usually larger than 16 µm; stem leaves usually shorter than 1.2 mm
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Branches subjulaceous; stem and branch leaves slightly differentiated; alar cells 8-10 along margins; endostome 0.3 mm beyond mouth.
|[[Pylaisia polyantha|Pylaisia polyantha]]
|-id=key-0-2
|2
|Branches ± complanate-foliate, partly subjulaceous; stem and branch leaves well differentiated; alar cells 10-15 along margins; endostome 0.4-0.5 mm beyond mouth.
|[[Pylaisia steerei|Pylaisia steerei]]
|-id=key-0-3
|3
|Endostome free distally; stems regularly pinnate; alar cells 20-25 along margins.
|[[Pylaisia selwynii|Pylaisia selwynii]]
|-id=key-0-3
|3
|Endostome wholly adherent; stems irregularly pinnate; alar cells 6-12 along margins.
|[[Pylaisia intricata|Pylaisia intricata]]
|}
</div></div><!--

-->{{#Taxon:
name=Pylaisia
|author=Tomotsugu Arikawa
|authority=Schimper in P. Bruch and W. P. Schimper
|rank=genus
|parent rank=family
|synonyms=Pylaisiella
|basionyms=
|family=Hypnaceae
|distribution=North America;Mexico;Central America;South America (Andes Mountains);Europe;Asia
|reference=None
|publication title=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_879.xml
|genus=Pylaisia
|annulus variability=not;differentiated
|apex shape=subulate;acuminate
|basal membrane presence=absent
|base shape=decurrent
|branch leaf development=specialized
|branch leaf presence=absent
|branch leaf reproduction=autoicous;sexual;asexual
|branch leaf shape=narrowly ovate;oblong-lanceolate
|branch leaf size=occasionally somewhat larger;smaller to occasionally
|branch shape=curled
|calyptra architecture=naked
|capsule condition or size=not contracted
|capsule course=straight
|capsule orientation=erect;suberect
|capsule shape=oblong-cylindric;oblong-ovoid
|cell shape=subquadrate;rectangular
|cell variability=differentiated
|central strand presence=absent
|central strand size=small
|cilium prominence=rudimentary
|costa height or length or size=short
|costa prominence=indistinct
|distal cell quantity=1;6
|exostome tooth relief=papillose
|external surface architecture or pubescence or relief=smooth
|hyalodermi presence=absent
|inner perichaetial leaf orientation=erect
|inner perichaetial leaf shape=oblong-lanceolate
|laminal cell architecture or pubescence or relief=smooth
|margin shape=subentire;serrulate
|margin shape or vernation=involute
|mat position=low
|operculum height or length or size=short
|operculum shape=obtuse;long-acute;conic;rostrate
|peristome architecture=hygroscopic;perfect
|peristome size=reduced
|pseudoparaphyllium architecture=foliose
|segment prominence=fragmentary
|segment shape=keeled;2-fid
|seta coloration=reddish;yellowish
|spore relief=papillose
|spore shape=spheric
|stem architecture or shape=pinnate
|stem growth form or orientation=creeping
|stem-leaf architecture or arrangement or shape or vernation=plicate
|stem-leaf fixation or orientation=appressed
|stem-leaf orientation=erect-spreading
|stem-leaf shape=ovatelanceolate
|stem-leaf width=widest
|whole_organism coloration=yellowish;whitish
|whole_organism growth form=plant
|whole_organism reflectance=shiny
|whole_organism size=small
}}<!--

-->[[Category:Treatment]][[Category:Hypnaceae]]