View source for Aschisma

{{Treatment/ID
|accepted_name=Aschisma
|accepted_authority=Lindberg
|publications={{Treatment/Publication
|title=Utkast Eur. Bladmoss.,
|place=28. 1878 ,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Phascum subg. Aschisma
|authority=(Lindberg) Kindberg
|rank=subgenus
}}
|hierarchy=Pottiaceae;Pottiaceae subfam. Trichostomoideae;Aschisma
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pottiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Pottiaceae subfam. Trichostomoideae]]</div><div class="higher-taxon"><small>genus</small>[[Aschisma]]</div></div>
|etymology=Greek, a-, not or without, and schisma, split, alluding to indehiscent capsule
|volume=Volume 27
|mention_page=page 478, 519
|treatment_page=page 518
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>small, gregarious or forming a thin mat, green. <b>Stems</b> ca. 0.2 mm, branching seldom; rounded-pentagonal in transverse section, hyalodermis absent, sclerodermis absent, central strand present, weak; rhizoids absent; axillary hairs ca. 3 cells in length, basal cell thick-walled. <b>Leaves</b> incurved, tubulose when dry, weakly spreading when moist; oblong or triangular to short-lanceolate, often falcate or concave, adaxial surface broadly channeled, 0.6–1 mm; base little differentiated in shape; distal margins plane to recurved, entire to sharply serrulate beyond mid leaf, bordered beyond middle, proximally or throughout by 1–3 rows weakly papillose, elongate cells; apex broadly or rounded acute, costa excurrent as a sharp mucro, occasionally rough or denticulate, adaxial outgrowths absent, adaxial cells elongate, in 2-4 rows, transverse section circular, adaxial epidermis absent, adaxial stereid band present, substereid, guide cells 2–4 in 1 layer, hydroid strand absent or present, abaxial stereid band present, often substereid, elliptical in section, abaxial epidermis absent; basal cells strongly differentiated, rising higher along margins in a V, rectangular, little wider than distal cells, 3–5:1, walls of basal cells very thin to evenly thickened; distal medial cells quadrate to occasionally short-rectangular, 9–12 µm wide, 1:1(–2), papillae stout, 2-fid, crowded, scattered or centered over lumens, cell walls evenly thickened, flat or bulging only ventrally or on both exposed surfaces. <b>Specialized</b> asexual reproduction absent. <b>Sexual</b> condition monoicous (paroicous or stalked autoicous bud at base of perichaetial plant); perichaetia terminal, interior leaves not sheathing, long-elliptic, to 1.5 mm. <b>Seta</b> hyaline, very short, ca. 50 µm, straight. <b>Capsule</b> yellowish brown, spheric, about 0.3 mm, with a small blunt apiculus of ca. 30 µm, annulus absent; operculum absent; peristome teeth absent. <b>Calyptra</b> short-triangular, split once or twice, 0.2–0.3 mm, rough. <b>Spores</b> 18–24 µm, essentially smooth to spiculose-papillose, yellowish brown. KOH laminal color reaction yellow.</span><!--

-->{{Treatment/Body
|distribution=Kans.;Europe.
|discussion=<p>Species 2 (1 in the flora).</p><!--
--><p><i>Aschisma</i> is widely distributed in the Mediterranean area, and is disjunctive to central North America. It is found in dry climates on soil.</p>
|tables=
|references={{Treatment/Reference
|id=andrews1915a
|text=Andrews, A. L. 1915. Aschisma kansanum, a new species, with remarks upon the genus. Torreya 15: 63–67.
}}{{Treatment/Reference
|id=cridland1959a
|text=Cridland, A. A. 1959. The habitat of Aschisma kansanum. Bryologist 62: 132–135.
}}{{Treatment/Reference
|id=smith1990a
|text=Smith, Gary L. 1990. What in the world is “Aschisma”? Aschisma 1: 2.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Aschisma
|author=Richard H. Zander
|authority=Lindberg
|rank=genus
|parent rank=subfamily
|synonyms=Phascum subg. Aschisma
|basionyms=
|family=Pottiaceae
|distribution=Kans.;Europe.
|reference=andrews1915a;cridland1959a;smith1990a
|publication title=Utkast Eur. Bladmoss.,
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_745.xml
|subfamily=Pottiaceae subfam. Trichostomoideae
|genus=Aschisma
}}<!--

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