View source for Hymenostylium recurvirostrum

{{Treatment/ID
|accepted_name=Hymenostylium recurvirostrum
|accepted_authority=(Hedwig) Dixon
|publications={{Treatment/Publication
|title=Rev. Bryol. Lichénol., n. s.
|place=6: 96. 1934,
}}
|basionyms={{Treatment/ID/Basionym
|name=Gymnostomum recurvirostrum
|authority=Hedwig
|publication_title=Sp. Musc. Frond.,
|publication_place=33. 1801
}}
|synonyms=
|hierarchy=Pottiaceae;Pottiaceae subfam. Barbuloideae;Hymenostylium;Hymenostylium recurvirostrum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pottiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Pottiaceae subfam. Barbuloideae]]</div><div class="higher-taxon"><small>genus</small>[[Hymenostylium]]</div><div class="higher-taxon"><small>species</small>[[Hymenostylium recurvirostrum]]</div></div>
|volume=Volume 27
|mention_page=page 496, 522, 536, 537, 557, 558, 560, 564, 579
|treatment_page=page 578
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>slender, fragile, 0.5–7 cm. <b>Leaves</b> more or less distant; costa ending 1–2 cells before apex to percurrent or short-excurrent as a flat to conical apiculus, occasionally ending in a pellucid cell, often scalloped along margins by projecting cell walls, at mid leaf with 2–4 or occasionally several rows of cells across adaxial surface; costa adaxial surface are U-shaped in section; basal cells gradually differentiated, elongate-rectangular, less to nonpapillose proximally, larger than distal cells, 20-50 µm, 2–4:1, walls firm, narrower on the margins, pellucid; distal laminal cells heterogeneous: subquadrate to short-rectangular or rhomboidal, with occasional diagonally transverse walls, longitudinally elongate especially distally near the costa, walls commonly irregularly thickened to porose, marginal cells smaller and more quadrate, ca. 7–10(–12) µm wide, 1–3:1, 1:2, seldom 2-stratose in patches, cell walls superficially flat to somewhat convex, firm-walled; papillae low, simple to 2-fid, 1–3(–5) per lumen, dense to scattered, occasionally absent. <b>Sexual</b> condition perigonial terminal and often also lateral proximally. <b>Seta</b> single, (0.04–)0.5–0.9(–1) cm. <b>Capsule</b> urn 0.5–0.9(–10) mm, often widest at the mouth when dry, exothecial cells thin- to thick-walled, 1–4:1, stomates phaneropore at base of capsule; annulus weakly vesiculose. <b>Operculum</b> ca. 0.5–1 mm, usually attached to the columella at least in some capsules. <b>Calyptra</b> ca. 1–1.5 mm. <b>Spores</b> ca. (13–)17–20(–22) µm.</span><!--

-->{{Treatment/Body
|distribution=North America;Central America;South America;Europe;Asia;Africa;Atlantic Islands;Pacific Islands;Australasia.
|discussion=<p>Varieties 5 (2 in the flora).</p><!--
--><p><i>Hymenostylium recurvirostrum</i> is distinctive among similar species in having one laminal margin typically recurved, the other erect. A character often overlooked in texts is the universal presence of a long, narrow, fragile decurrency in the basal angles. Both <i>Gymnostomum aeruginosum</i> and <i>Eucladium verticillatum</i> have an adaxial epidermis in the costal section, with papillose and quadrate cells on the adaxial surface of the costa in plane view, and the costa profile is round (convex), but <i>Hymenostylium</i> has long, thin and smooth cells in plane view because the epidermal layer is not developed, and the costal profile is convex adaxially, being lunate in section. In <i>Anoectangium aestivum</i>, as in those two species, the dense laminal papillae often obscure cell lumens, but the leaf section shows a very deeply keeled leaf with the leaf lamina adjacent to the costa nearly contiguous or touching, showing a deep, narrow channel in plane view and a circular costa section. The adaxial stereid band is always absent in <i>A. aestivum</i>, but often present in <i>H. recurvirostrum</i>. <i>Molendoa sendtneriana</i> is similar but has a stem central strand, and lateral perichaetia (like <i>A. aestivum</i>).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves 1-1.6 mm, margins narrowly recurved proximally, rarely 2-stratose distally, base not differentiated in shape or ovate; stem hyalodermis variably absent or present, leaf cells mostly evenly thickened except along the costa; costa in section depauperate, adaxial stereids (0-)2-4 cells across, stem sclerodermis of (0-)1-2(-3) layers
|[[Hymenostylium recurvirostrum var. recurvirostrum|Hymenostylium recurvirostrum var. recurvirostrum]]
|-id=key-0-1
|1
|Leaves (1.6-)2-2.4 mm, margins broadly recurved proximally, often 2-stratose in patches distally, base rectangular, flaring, with shoulders; stem hyalodermis always present, leaf cells distinctly porose throughout or at the leaf base, especially along the costa; costa in section robust, adaxial stereids 6-8(-10) cells across; stem sclerodermis thick, of 3-5 layers
|[[Hymenostylium recurvirostrum var. insigne|Hymenostylium recurvirostrum var. insigne]]
|}
</div></div><!--

-->{{#Taxon:
name=Hymenostylium recurvirostrum
|author=
|authority=(Hedwig) Dixon
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Gymnostomum recurvirostrum
|family=Pottiaceae
|distribution=North America;Central America;South America;Europe;Asia;Africa;Atlantic Islands;Pacific Islands;Australasia.
|reference=None
|publication title=Rev. Bryol. Lichénol., n. s.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V27/V27_829.xml
|subfamily=Pottiaceae subfam. Barbuloideae
|genus=Hymenostylium
|species=Hymenostylium recurvirostrum
}}<!--

-->[[Category:Treatment]][[Category:Hymenostylium]]