View source for Microbryum

{{Treatment/ID
|accepted_name=Microbryum
|accepted_authority=Schimper
|publications={{Treatment/Publication
|title=Syn. Musc. Eur.,
|place=10. 1860,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Phascum sect. Microbryum
|authority=(Schimper) Podpera
|rank=section
}} {{Treatment/ID/Synonym
|name=Phascum subg. Microbryum
|authority=(Schimper) Limpricht
|rank=subgenus
}} {{Treatment/ID/Synonym
|name=Phascum sect. Pottiella
|authority=(Limpricht) Paris
|rank=section
}} {{Treatment/ID/Synonym
|name=Phascum subg. Pottiella
|authority=Limpricht
|rank=subgenus
}} {{Treatment/ID/Synonym
|name=Pottia sect. Pottiella
|authority=(Limpricht) Nyholm
|rank=section
}} {{Treatment/ID/Synonym
|name=Pottia subg. Pottiella
|authority=(Limpricht) Brotherus
|rank=subgenus
}}
|hierarchy=Pottiaceae;Pottiaceae subfam. Pottioideae;Microbryum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pottiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Pottiaceae subfam. Pottioideae]]</div><div class="higher-taxon"><small>genus</small>[[Microbryum]]</div></div>
|etymology=Greek mikros, small, and bryon, moss
|volume=Volume 27
|mention_page=page 480, 587, 628, 638
|treatment_page=page 627
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in a low turf, scattered or gregarious, occasionally bulbiform, reddish brown distally, brown proximally. <b>Stem</b> very short, 0.2–0.4 mm, hyalodermis absent, sclerodermis absent or weakly differentiated, central strand present or absent; axillary hairs of 3–6 cells, the proximal 1-2 cells usually with thicker walls. <b>Leaves</b> appressed when dry, weakly spreading, tips occasionally reflexed when moist, lanceolate, elliptical or ovate, adaxial surface weakly concave to broadly channeled, short, 0.6–1.8 mm; base not differentiated, proximal margins not differentiated; distal margins recurved at mid leaf and commonly recurved to near apex, entire or rarely serrulate near apex, margins occasionally less papillose and somewhat thicker walled than medially; apex broadly acute; costa excurrent as an apiculus, mucro or short awn, occasionally only percurrent, adaxial outgrowths occasionally present as a pad of enlarged parenchymatous cells, adaxial cells quadrate or short-rectangular or elongate, in 2(4–6) rows; transverse section usually round, adaxial epidermis present, adaxial stereid band absent, guide cells 2(–4) in 1 layer, hydroid strand present, occasionally central, abaxial stereid band present, round to semicircular in sectional shape, abaxial epidermis present; proximal cells differentiated across leaf or higher medially, rectangular, 2–4:1, walls of proximal cells usually thin; distal medial cells quadrate to hexagonal or short-rectangular, occasionally rhomboidal, small to somewhat enlarged, 11–15 µm wide, 1–2:1, 1-stratose; papillae usually simple (seldom 2-fid), hollow, 1–6 per lumen, occasionally branching and tall, cell-walls thin to moderately and evenly thickened, convex on both sides. <b>Specialized</b> asexual reproduction absent. <b>Sexual</b> condition monoicous, usually paroicous, occasionally synoicous. <b>Perichaetia</b> terminal, interior leaves often somewhat enlarged, otherwise little differentiated. <b>Seta</b> very short to elongate (to 4 mm). <b>Capsule</b> stegocarpous or cleistocarpous, theca ovate to short elliptical, apiculate when cleistocarpous, 0.5–1.1 mm, annulus absent or of 1–2 rows of weakly vesiculose cells, persistent; operculum when differentiated low-conic, peristome teeth when present 16, irregular, often rudimentary, ligulate to triangular in shape, untwisted. <b>Calyptra</b> conic-cucullate, occasionally mitrate. <b>Spores</b> large, 20–30 µm. KOH laminal color reaction red.</span><!--

-->{{Treatment/Body
|distribution=Worldwide in temperate zones.
|discussion=<p>Species 13 (4 in the flora).</p><!--
--><p><i>Microbryum</i> is similar to <i>Syntrichia</i> in its broad leaves, single stereid band, and red reaction of the lamina to KOH, but differs in the short stems, distinctive reduction series involving the sporophyte, round to semicircular costal stereid band (reniform in <i>Syntrichia</i>), peristomes (when present) of 16 irregular, often rudimentary, truncate peristome teeth that are large in comparison with the size of the capsule, and operculum (when present) low-conic. Adaxial costal pads of cells are occasionally present (in <i>M. vlassovii</i>). Distinguishing features include variation in ornamentation and size of the spores, and collections of these monoicous taxa usually include sporophytes.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Distal laminal cells bulging very strongly medially, projecting as ôbottle-shapedö cells on the adaxial surface of the costa
|[[Microbryum vlassovii|Microbryum vlassovii]]
|-id=key-0-1
|1
|Distal laminal cells weakly convex adaxially, not of distinctive shape
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Seta very short, capsules nearly spheric, cleistocarpous
|[[Microbryum floerkeanum|Microbryum floerkeanum]]
|-id=key-0-2
|2
|Seta elongate, capsules elliptical to cylindric, stegocarpous (occasionally operculum not dehiscent) or rarely cleistocarpous
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Spores smooth or tuberculate (seldom also weakly papillose), 22-30 µm
|[[Microbryum starckeanum|Microbryum starckeanum]]
|-id=key-0-3
|3
|Spores papillose or spiculose, 28-39 µm
|[[Microbryum davallianum|Microbryum davallianum]]
|}
</div></div><!--

-->{{#Taxon:
name=Microbryum
|author=Richard H. Zander
|authority=Schimper
|rank=genus
|parent rank=subfamily
|synonyms=Phascum sect. Microbryum;Phascum subg. Microbryum;Phascum sect. Pottiella;Phascum subg. Pottiella;Pottia sect. Pottiella;Pottia subg. Pottiella
|basionyms=
|family=Pottiaceae
|distribution=Worldwide in temperate zones.
|reference=None
|publication title=Syn. Musc. Eur.,
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V27/V27_919.xml
|subfamily=Pottiaceae subfam. Pottioideae
|genus=Microbryum
}}<!--

-->[[Category:Treatment]][[Category:Pottiaceae subfam. Pottioideae]]