View source for Trematodon

{{Treatment/ID
|accepted_name=Trematodon
|accepted_authority=Michaux
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=2: 289. 1803 ,
}}
|basionyms=
|synonyms=
|hierarchy=Bruchiaceae;Trematodon
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Bruchiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Trematodon]]</div></div>
|etymology=Greek trema, hole, and odon, tooth, alluding to perforate peristome teeth
|volume=Volume 27
|mention_page=page 15, 433, 434
|treatment_page=page 437
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="leaf arrangement or shape;leaf shape;leaf some measurement;base shape;base shape;base architecture or shape;apex shape;margin architecture or shape;margin architecture or shape;tooth quantity"><b>Leaves </b>usually contorted when dry, lanceolate to broadly subulate from an ovate or oblong sheathing base, 1.5–4 mm, apex acute to narrowly obtuse, margins entire or with a few teeth apically;</span> <span class="statement" id="st-d0_s1" data-properties="costa architecture">costa subpercurrect to excurrent as a subula;</span> <span class="statement" id="st-d0_s2" data-properties="distal laminal cell shape;distal laminal cell shape">distal laminal cells subquadrate or shortrectangular.</span> <span class="statement" id="st-d0_s3" data-properties="perichaetial leaf size;perichaetial leaf architecture or shape"><b>Perichaetial </b>leaves distinctly larger than the cauline, convolute-sheathing.</span> <span class="statement" id="st-d0_s4" data-properties="seta shape;seta some measurement"><b>Seta </b>elongate, 0.5–1.5 cm.</span> <span class="statement" id="st-d0_s5" data-properties="capsule position;capsule shape;capsule shape;neck variability"><b>Capsule </b>long-exserted, cylindric with neck strongly differentiated, conic to long-cylindric;</span> <span class="statement" id="st-d0_s6" data-properties="peristome presence;peristome presence;peristome coloration or relief;tooth quantity;tooth architecture;tooth shape;tooth architecture">peristome absent or present, of 16 simple, forked or perforate teeth, vertically barred on external surface;</span> <span class="statement" id="st-d0_s7" data-properties="operculum variability;operculum shape">operculum differentiated, obliquely long-rostrate.</span> <span class="statement" id="st-d0_s8" data-properties="calyptra shape"><b>Calyptra </b>cucullate.</span> <span class="statement" id="st-d0_s9" data-properties="spore size;spore some measurement;spore relief"><b>Spores </b>medium-sized, 20–30 µm, papillose.</span><!--

-->{{Treatment/Body
|distribution=Worldwide;mainly temperate areas
|discussion=<p>Species ca. 25 (6 in the flora).</p><!--
--><p>Trematodon is clearly in need of revision, with more than 80 correct binomials extant but only about 25 species commonly accepted as well characterized. It clearly intergrades with Bruchia. Within the genus, only T. ambiguus and T. longicollis have strumose capsules.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Seta short, 1-4 mm; peristome teeth undivided, annulus simple
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Seta long, (4-)10-30 mm; peristome teeth split, or perforate basally or apically, occasionally entire, annulus usually compound, revoluble
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Seta 1.5-2 mm; capsule neck short, barely as long as the urn, obovate; peristome fragile, often lost with dehiscence of operculum; leaves abruptly subulate, entire at apex.
|[[Trematodon montanus|Trematodon montanus]]
|-id=key-0-2
|2
|Seta 1-4 mm; capsule neck slightly longer than the urn, tapering-conic; peristome persistent; leaves long-lanceolate, weakly denticulate apically.
|[[Trematodon boasii|Trematodon boasii]]
|-id=key-0-3
|3
|Capsule neck strumose
|[[#key-0-4| > 4]]
|-id=key-0-3
|3
|Capsule neck not strumose
|[[#key-0-5| > 5]]
|-id=key-0-4
|4
|Capsule neck about 2-3 times the length of urn.
|[[Trematodon longicollis|Trematodon longicollis]]
|-id=key-0-4
|4
|Capsule neck about the length of the urn.
|[[Trematodon ambiguus|Trematodon ambiguus]]
|-id=key-0-5
|5
|Leaves broad, ovate-lanceolate; capsule somewhat curved, peristome teeth entire or perforate near apex.
|[[Trematodon brevicollis|Trematodon brevicollis]]
|-id=key-0-5
|5
|Leaves narrow, mostly long-lanceolate; capsule straight, peristome teeth perforate medially and often split near apex.
|[[Trematodon laetevirens|Trematodon laetevirens]]
|}
</div></div><!--

-->{{#Taxon:
name=Trematodon
|authority=Michaux
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Bruchiaceae
|distribution=Worldwide;mainly temperate areas
|reference=None
|publication title=Fl. Bor.-Amer.
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V27/V27_628.xml
|genus=Trematodon
|apex shape=acute;narrowly obtuse
|base architecture or shape=sheathing
|base shape=oblong;ovate
|calyptra shape=cucullate
|capsule position=long-exserted
|capsule shape=conic;long-cylindric
|costa architecture=excurrent
|distal laminal cell shape=shortrectangular;subquadrate
|leaf arrangement or shape=contorted
|leaf shape=lanceolate;broadly subulate
|leaf some measurement=1.5mm;4mm
|margin architecture or shape=with a few teeth;entire
|neck variability=differentiated
|operculum shape=long-rostrate
|operculum variability=differentiated
|perichaetial leaf architecture or shape=convolute-sheathing
|perichaetial leaf size=distinctly larger
|peristome coloration or relief=barred
|peristome presence=absent;absent
|seta shape=elongate
|seta some measurement=0.5cm;1.5cm
|spore relief=papillose
|spore size=medium-sized
|spore some measurement=20um;30um
|tooth architecture=perforate;simple
|tooth quantity=16;few
|tooth shape=forked
}}<!--

-->[[Category:Treatment]][[Category:Bruchiaceae]]