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-undefined" data-properties=""><b>Plants </b>small, in low mats, yellowish to whitish, shiny. <b>Stems</b> creeping, regularly or irregularly pinnate, branches usually strongly curled when dry; hyalodermis absent, central strand present, small; pseudoparaphyllia foliose. <b>Stem</b> and branch leaves similar. <b>Stem</b> leaves appressed when dry, erect-spreading when moist, ovate-lanceolate, widest beyond base, not or slightly plicate; base not or weakly decurrent; margins plane, sometimes slightly involute distally, subentire to serrulate distally; apex acuminate; costa double and short or indistinct; alar cells differentiated, subquadrate to rectangular; laminal cells smooth; distal cells usually longer than 6:1. <b>Branch</b> leaves narrowly ovate- to oblong-lanceolate, smaller to occasionally somewhat larger than stem leaves. <b>Specialized</b> asexual reproduction absent. <b>Sexual</b> condition autoicous; inner perichaetial leaves erect, oblong-lanceolate, apex subulate. <b>Seta</b> yellowish or reddish. <b>Capsule</b> erect to suberect, oblong-cylindric to oblong-ovoid, straight, not contracted below mouth; annulus differentiated or not; operculum conic to rostrate, obliquely short- to long-acute or obtuse; peristome perfect to reduced, hygroscopic; exostome teeth with external surface smooth basally, sometimes roughly papillose distally; endostome basal membrane present, segments sometimes 2-fid or fragmentary, keeled, cilia rudimentary. <b>Calyptra</b> naked. <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><i>Pylaisia</i> 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={{Treatment/Reference
|id=arikawa2004a
|text=Arikawa, T. 2004. A taxonomic study of the genus Pylaisia (Hypnaceae, Musci). J. Hattori Bot. Lab. 95: 71–154.
}}
}}<!--

--><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=arikawa2004a
|publication title=P. Bruch and W. P. Schimper, Bryol. Europ.
|publication year=1851
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V28/V28_879.xml
|genus=Pylaisia
}}<!--

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