View source for Ditrichum heteromallum

{{Treatment/ID
|accepted_name=Ditrichum heteromallum
|accepted_authority=(Hedwig) E. Britton
|publications={{Treatment/Publication
|title=in N. L. Britton et al., N. Amer. Fl.
|place=15: 64. 1913,
}}
|basionyms={{Treatment/ID/Basionym
|name=Weissia heteromalla
|authority=Hedwig
|rank=species
|publication_title=Sp. Musc. Frond.,
|publication_place=71. 1801
}}
|synonyms={{Treatment/ID/Synonym
|name=Didymodon homomallus
|authority=Hedwig
|rank=species
}} {{Treatment/ID/Synonym
|name=Ditrichum homomallum
|authority=(Hedwig) Hampe
|rank=species
}} {{Treatment/ID/Synonym
|name=Ditrichum zonatum
|authority=(Bridel) Kindberg
|rank=species
}} {{Treatment/ID/Synonym
|name=Ditrichum zonatum var. scabrifolium
|authority=Dixon
|rank=variety
}}
|hierarchy=Ditrichaceae;Ditrichum;Ditrichum heteromallum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Ditrichaceae]]</div><div class="higher-taxon"><small>genus</small>[[Ditrichum]]</div><div class="higher-taxon"><small>species</small>[[Ditrichum heteromallum]]</div></div>
|volume=Volume 27
|mention_page=page 451, 454, 455
|treatment_page=page 453
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in loose to dense tufts, yellowish green. <b>Stems</b> to 1 cm, simple, seldom branched. <b>Leaves</b> 1.5–3 mm, erect-spreading, sometimes slightly secund, from an ovate to oblong base tapering gradually to a long channelled subula, lamina 2-stratose distally; margins plane, 1-stratose proximally, 2-stratose in the middle to distal parts; costa broad, occupying most of the subula, in section with a distinct abaxial and poorly developed adaxial stereid band; cells of subula and distal lamina elongate-rectangular, longer in the leaf base, smooth or sometimes papillose at both ends, especially near leaf apices. <b>Specialized</b> asexual reproduction by rarely produced rhizoidal tubers. <b>Sexual</b> condition dioicous. <b>Seta</b> reddish brown, 1–2.5 mm. <b>Capsule</b> erect, reddish brown, oblong to cylindric, symmetric, 0.5–1.5 mm; peristome teeth pale orange, about 300 µm, lightly papillose; operculum conic-rostrate, blunt, 0.4–0.5 mm. <b>Spores</b> 10–15 µm, finely papillose.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature summer (Jun–Aug).
|habitat=Soil
|elevation=low to high elevations (50-1500 m or higher)
|distribution=B.C.;Alaska;Oreg.;Wash.;South America (Colombia);Europe;Asia (China;Japan;Taiwan);Atlantic Islands (Iceland).
|discussion=<p>Rhizoidal tubers were first reported for <i>Ditrichum heteromallum</i> by S. Risse (1985) from European material and have also been noted in Japanese material by H. Deguchi and T. Matsui (1986). They have the appearance of short filaments with swollen, contorted rhizoid cells. <i>Ditrichum</i> zonatum (Bridel) Kindberg, including the var. scabrifolium Dixon, appears to be only a small form of <i>D. heteromallum</i> with shorter, appressed leaves that are often more 2-stratose, especially near the base, and leaf cells that are sometimes papillose at the ends. We have not seen specimens that support the Wisconsin report by F. Bowers and S. Freckman (1979) and believe the record to be dubious.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ditrichum heteromallum
|authority=(Hedwig) E. Britton
|rank=species
|parent rank=genus
|synonyms=Didymodon homomallus;Ditrichum homomallum;Ditrichum zonatum;Ditrichum zonatum var. scabrifolium
|basionyms=Weissia heteromalla
|family=Ditrichaceae
|phenology=Capsules mature summer (Jun–Aug).
|habitat=Soil
|elevation=low to high elevations (50-1500 m or higher)
|distribution=B.C.;Alaska;Oreg.;Wash.;South America (Colombia);Europe;Asia (China;Japan;Taiwan);Atlantic Islands (Iceland).
|reference=None
|publication title=in N. L. Britton et al., N. Amer. Fl.
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_654.xml
|genus=Ditrichum
|species=Ditrichum heteromallum
}}<!--

-->[[Category:Treatment]][[Category:Ditrichum]]