View source for Pseudoditrichaceae

{{Treatment/ID
|accepted_name=Pseudoditrichaceae
|accepted_authority=Steere & Z. Iwatsuki
|publications=
|basionyms=
|synonyms=
|hierarchy=Pseudoditrichaceae
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pseudoditrichaceae]]</div></div>
|volume=Volume 28
|mention_page=
|treatment_page=page 188
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism arrangement;whole_organism growth form;whole_organism growth form"><b>Plants </b>scattered or gregarious, acrocarpous.</span> <span class="statement" id="st-d0_s1" data-properties="stem architecture"><b>Stems </b>unbranched.</span> <span class="statement" id="st-d0_s2" data-properties="leaf orientation;leaf shape"><b>Leaves </b>erect-spreading, linear-lanceolate;</span> <span class="statement" id="st-d0_s3" data-properties="base shape;base architecture or shape">base oblong, ± sheathing;</span> <span class="statement" id="st-d0_s4" data-properties="costa size or width;costa fragility">costa narrow, delicate proximally, nearly filling acumen;</span> <span class="statement" id="st-d0_s5" data-properties="laminal cell-wall width">laminal cell-walls ± thick;</span> <span class="statement" id="st-d0_s6" data-properties="basal-cell shape">basal-cells long-rectangular;</span> <span class="statement" id="st-d0_s7" data-properties="medial cell shape">medial cells irregularly rhombic at shoulders;</span> <span class="statement" id="st-d0_s8" data-properties="">distal cells longer on distal costa.</span> <span class="statement" id="st-d0_s9" data-properties="distal cell length or size;distal cell reproduction;distal cell reproduction"><b>Sexual </b>condition dioicous;</span> <span class="statement" id="st-d0_s10" data-properties="whole_organism reproduction;whole_organism size;whole_organism growth form;leaf architecture">male plants smaller, leaves less secund than females;</span> <span class="statement" id="st-d0_s11" data-properties="perigonial and perichaetial leaf variability">perigonial and perichaetial leaves scarcely differentiated.</span> <span class="statement" id="st-d0_s12" data-properties="seta shape"><b>Seta </b>elongate.</span> <span class="statement" id="st-d0_s13" data-properties="capsule orientation;capsule shape"><b>Capsule </b>suberect, ovoid;</span> <span class="statement" id="st-d0_s14" data-properties="exothecial cell shape">exothecial cells elongate-rectangular;</span> <span class="statement" id="st-d0_s15" data-properties="annulus architecture">annulus revoluble;</span> <span class="statement" id="st-d0_s16" data-properties="peristome arrangement">peristome diplolepidous-alternate;</span> <span class="statement" id="st-d0_s17" data-properties="exostome tooth coloration;exostome tooth shape;exostome tooth architecture or course;exostome tooth architecture;exostome tooth relief;exostome tooth relief">exostome teeth pale-yellow to hyaline, narrowly lanceolate, somewhat irregular, trabeculate, pitted basally, papillose distally;</span> <span class="statement" id="st-d0_s18" data-properties="basal membrane position;basal membrane coloration;segment shape;segment orientation;half arrangement;segment arrangement;cilium presence">endostome basal membrane low, scarcely exceeding capsule rim, hyaline to pale-yellow, segments divided to base and diverging, halves of adjacent segments converging opposite exostome teeth, cilia absent.</span> <span class="statement" id="st-d0_s19" data-properties="calyptra shape"><b>Calyptra </b>cucullate.</span><!--

-->{{Treatment/Body
|distribution=N.W.T.
|discussion=<p>Species 1.</p><!--
--><p>Pseudoditrichaceae consists of a single species, known only from the type specimen collected near Great Bear Lake, Northwest Territories. In the original description, Steere and Iwatsuki interpreted the endostome segments as opposite the exostome teeth. A. J. Shaw (1984) showed that the apparently opposite segments consist of two halves of adjacent alternate segments that are split to and diverge from their bases, and that the peristome should be interpreted as diplolepidous-alternate. The gametophytes are scarcely distinguishable from those of Ditrichum. This and the unique peristome warrant familial recognition.</p>
|tables=
|references=
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-->{{#Taxon:
name=Pseudoditrichaceae
|author=A. Jonathan Shaw
|authority=Steere & Z. Iwatsuki
|rank=family
|parent rank=
|synonyms=
|basionyms=
|family=Pseudoditrichaceae
|illustrator=Patricia M. Eckel
|illustration copyright=Flora of North America Association
|distribution=N.W.T.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V28/V28_301.xml
|annulus architecture=revoluble
|basal membrane coloration=hyaline;pale-yellow
|basal membrane position=low
|basal-cell shape=long-rectangular
|base architecture or shape=sheathing
|base shape=oblong
|calyptra shape=cucullate
|capsule orientation=suberect
|capsule shape=ovoid
|cilium presence=absent
|costa fragility=delicate
|costa size or width=narrow
|distal cell length or size=longer
|distal cell reproduction=dioicous;sexual
|exostome tooth architecture=trabeculate
|exostome tooth architecture or course=irregular
|exostome tooth coloration=pale-yellow;hyaline
|exostome tooth relief=papillose;pitted
|exostome tooth shape=lanceolate
|exothecial cell shape=elongate-rectangular
|half arrangement=converging
|laminal cell-wall width=thick
|leaf architecture=less secund than females
|leaf orientation=erect-spreading
|leaf shape=linear-lanceolate
|medial cell shape=rhombic
|perigonial and perichaetial leaf variability=differentiated
|peristome arrangement=diplolepidous-alternate
|segment arrangement=adjacent
|segment orientation=diverging
|segment shape=divided
|seta shape=elongate
|stem architecture=unbranched
|whole_organism arrangement=scattered
|whole_organism growth form=plant;plant;gregarious
|whole_organism reproduction=male
|whole_organism size=smaller
}}<!--

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