View source for Isothecium cristatum

{{Treatment/ID
|accepted_name=Isothecium cristatum
|accepted_authority=(Hampe) H. Robinson
|publications={{Treatment/Publication
|title=Bryologist
|place=65: 95. 1963
|year=1963
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Leptohymenium cristatum
|authority=Hampe
|rank=species
|publication_title=Linnaea
|publication_place=30: 459. 1860
}}
|synonyms={{Treatment/ID/Synonym
|name=Isothecium aggregatum
|authority=(Mitten) A. Jaeger
|rank=species
}} {{Treatment/ID/Synonym
|name=I. brewerianum
|authority=(Kindberg) Kindberg
|rank=species
}} {{Treatment/ID/Synonym
|name=I. howei
|authority=Kindberg
|rank=species
}} {{Treatment/ID/Synonym
|name=I. hylocomioides
|authority=(Kindberg) Kindberg
|rank=species
}}
|hierarchy=Lembophyllaceae;Isothecium;Isothecium cristatum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Lembophyllaceae]]</div><div class="higher-taxon"><small>genus</small>[[Isothecium]]</div><div class="higher-taxon"><small>species</small>[[Isothecium cristatum]]</div></div>
|volume=Volume 28
|mention_page=page 619
|treatment_page=page 620
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism size;whole_organism coloration;whole_organism reflectance;whole_organism growth form"><b>Plants </b>medium-sized, dark to brownish green, glossy.</span> <span class="statement" id="st-d0_s1" data-properties="stipe height or length or size;secondary stem some measurement;secondary stem architecture or shape;secondary stem architecture;branch course;branch orientation;branch shape;branch shape;branch presence"><b>Stems </b>with stipe short, secondary stems 1–5 cm, strongly julaceous when dry, irregularly branched, branches curved downward when dry, attenuate at apices, flagelliform branches absent;</span> <span class="statement" id="st-d0_s2" data-properties="pseudoparaphyllium architecture;pseudoparaphyllium shape;pseudoparaphyllium shape">pseudoparaphyllia foliose, deltoid, pointed.</span> <span class="statement" id="st-d0_s3" data-properties="primary-stem leaf shape"><b>Primary-</b>stem leaves broadly ovate;</span> <span class="statement" id="st-d0_s4" data-properties="margin shape">margins weakly toothed to nearly entire;</span> <span class="statement" id="st-d0_s5" data-properties="apex shape;apex shape">apex attenuate, sometimes falcate;</span> <span class="statement" id="st-d0_s6" data-properties="">costa weak or obscure;</span> <span class="statement" id="st-d0_s7" data-properties="costa fragility;costa prominence;cell variability;region size;region quantity">alar cells well differentiated, region extensive, to 1/3 leaf length.</span> <span class="statement" id="st-d0_s8" data-properties="branchlet leaf shape"><b>Branchlet </b>leaves ovate to ovatelanceolate;</span> <span class="statement" id="st-d0_s9" data-properties="margin architecture or shape;margin shape">margins entire, sometimes coarsely toothed in apex;</span> <span class="statement" id="st-d0_s10" data-properties="">costa slender;</span> <span class="statement" id="st-d0_s11" data-properties="costa size;cell variability;cell height or length or size;region shape;region quantity">alar cells variable, usually shorter, region triangular, to 1/4 leaf length.</span> <span class="statement" id="st-d0_s12" data-properties="seta some measurement"><b>Seta </b>1–2 cm.</span> <span class="statement" id="st-d0_s13" data-properties="capsule some measurement"><b>Capsule </b>1–2 mm.</span><!--

-->{{Treatment/Body
|habitat=Trees, rock, logs
|elevation=low to moderate elevations
|distribution=B.C.;Calif.;Oreg.;Wash.
|discussion=<p>Isothecium cristatum, found primarily in summer-dry winter-wet climates, is a distinctive species with strongly julaceous shoots. The species is distinguished from others of Isothecium by its distinct triangular alar region on secondary stem branch leaves; from Nogopterium gracile, this feature as well as the single costa is immediately distinguishing. Antheridial plants have small bulbiform perigonia on main stem and lateral branches, and perichaetia are generally on main shoots. The leaves are usually abruptly tapering to the apex; the stem leaves have costae confined to the leaf base; the larger leaves of lateral branches are gradually tapered, with more pronounced alar cells than those of the branchlet leaves.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Isothecium cristatum
|authority=(Hampe) H. Robinson
|rank=species
|parent rank=genus
|synonyms=Isothecium aggregatum;I. brewerianum;I. howei;I. hylocomioides
|basionyms=Leptohymenium cristatum
|family=Lembophyllaceae
|habitat=Trees, rock, logs
|elevation=low to moderate elevations
|distribution=B.C.;Calif.;Oreg.;Wash.
|reference=None
|publication title=Bryologist
|publication year=1963
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V28/V28_974.xml
|genus=Isothecium
|species=Isothecium cristatum
|apex shape=falcate;attenuate
|branch course=curved
|branch orientation=downward
|branch presence=absent
|branch shape=flagelliform;attenuate
|branchlet leaf shape=ovate;ovatelanceolate
|capsule some measurement=1mm;2mm
|cell height or length or size=shorter
|cell variability=variable;differentiated
|costa fragility=weak
|costa prominence=obscure
|costa size=slender
|margin architecture or shape=entire
|margin shape=toothed;weakly toothed;nearly entire
|primary-stem leaf shape=ovate
|pseudoparaphyllium architecture=foliose
|pseudoparaphyllium shape=pointed;deltoid
|region quantity=0;1/4
|region shape=triangular
|region size=extensive
|secondary stem architecture=branched
|secondary stem architecture or shape=julaceous
|secondary stem some measurement=1cm;5cm
|seta some measurement=1cm;2cm
|stipe height or length or size=short
|whole_organism coloration=dark;brownish green
|whole_organism growth form=plant
|whole_organism reflectance=glossy
|whole_organism size=medium-sized
}}<!--

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