View source for Gemmabryum caespiticium

{{Treatment/ID
|accepted_name=Gemmabryum caespiticium
|accepted_authority=(Hedwig) J. R. Spence
|publications={{Treatment/Publication
|title=Phytologia
|place=91: 497. 2009
|year=2009
}}
|basionyms={{Treatment/ID/Basionym
|name=Bryum caespiticium
|authority=Hedwig
|rank=species
|publication_title=Sp. Musc. Frond.,
|publication_place=180. 1801
}}
|synonyms={{Treatment/ID/Synonym
|name=Ptychostomum imbricatulum
|authority=(Müller Hal.) D. T. Holyoak & N. Pedersen
|rank=species
}}
|hierarchy=Bryaceae;Gemmabryum;Gemmabryum sect. Caespitibryum;Gemmabryum caespiticium
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Bryaceae]]</div><div class="higher-taxon"><small>genus</small>[[Gemmabryum]]</div><div class="higher-taxon"><small>section</small>[[Gemmabryum sect. Caespitibryum]]</div><div class="higher-taxon"><small>species</small>[[Gemmabryum caespiticium]]</div></div>
|volume=Volume 28
|mention_page=page 132
|treatment_page=page 131
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>large. <b>Stems</b> 0.1–2(–3) cm. <b>Leaves</b> weakly to moderately concave, 0.5–2(–3) mm; margins plane to strongly revolute, limbidium distinct to weak, of 1 or 2 rows of elongate incrassate cells; apex occasionally hyaline with age; costa short- to long-excurrent, awn brown, yellow-brown, or sometimes hyaline, smooth or rarely somewhat denticulate, 1/4–3/4 leaf length; proximal laminal cells abruptly quadrate to rectangular, 1–2:1 away from costa, 2–4:1 along costa; medial and distal cells long-hexagonal, 12–18(–20) µm wide, (3–)4–6:1. <b>Specialized</b> asexual reproduction rare, by deciduous brood branchlets in distal leaf axils, and rhizoidal tubers, red, spheric, 100–200 µm, cells smooth. <b>Capsule</b> with endostome segments pale tan, brown, red-brown, or rarely pale yellow. <b>Spores</b> 8–14(–16) µm.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature Apr–Aug (spring–summer).
|habitat=Disturbed soil, earth banks, rotten wood, rock, disturbed habitats
|elevation=low to high elevations (0-4000 m)
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;Md.;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.;Mexico (Baja California;Hidalgo);s South America;Europe;Asia;Africa;Atlantic Islands;Pacific Islands;Australia.
|discussion=<p>The combination of small caespitose plants with ovate-lanceolate concave leaves, strong awns, and inflated subalar cells on fertile stems is diagnostic of <i>Gemmabryum caespiticium</i>. The last character is also a diagnostic character of sect. Cladodium of <i>Ptychostomum</i> and known from a few other species in other genera (for example, <i>Bryum</i> dyffryense Holyoak).</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Gemmabryum caespiticium
|authority=(Hedwig) J. R. Spence
|rank=species
|parent rank=section
|synonyms=Ptychostomum imbricatulum
|basionyms=Bryum caespiticium
|family=Bryaceae
|phenology=Capsules mature Apr–Aug (spring–summer).
|habitat=Disturbed soil, earth banks, rotten wood, rock, disturbed habitats
|elevation=low to high elevations (0-4000 m)
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;Md.;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.;Mexico (Baja California;Hidalgo);s South America;Europe;Asia;Africa;Atlantic Islands;Pacific Islands;Australia.
|reference=None
|publication title=Phytologia
|publication year=2009
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V28/V28_205.xml
|genus=Gemmabryum
|section=Gemmabryum sect. Caespitibryum
|species=Gemmabryum caespiticium
}}<!--

-->[[Category:Treatment]][[Category:Gemmabryum sect. Caespitibryum]]