View source for Thuidium ← Thuidium You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Thuidium |accepted_authority=Schimper in P. Bruch and W. P. Schimper |publications={{Treatment/Publication |title=in P. Bruch and W. P. Schimper, Bryol. Europ. |place=5: 157, plates 481 – 486. 1852 |year=1852 }} |basionyms= |synonyms= |hierarchy=Thuidiaceae;Thuidium |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Thuidiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Thuidium]]</div></div> |etymology=Genus Thuja and Latin -idium, diminutive, alluding to branched habit |volume=Volume 28 |mention_page=page 345, 374, 375, 377, 378, 648 |treatment_page=page 380 }}<!-- --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>large. <b>Stems</b> creeping to arched-ascending, 2- or 3-pinnate; paraphyllia mostly foliose, lanceolate or filiform-branched; axillary hairs 2–6(–7)-celled. <b>Stem</b> leaves ovate; margins plane, reflexed, or revolute, papillose-serrulate proximally, often serrulate distally by projecting cell ends; costa ending before apex; laminal cells rounded- to oblong-hexagonal, rhombic, or elliptic, coarsely 1-papillose abaxially, papillae sometimes 2-fid, appearing multipapillose. <b>Branch</b> leaves ovate; margins incurved, erect, or recurved, entire to denticulate; apex usually acute; costa ending before apex, not covered with cells apically; laminal cells rounded, hexagonal, elliptic, or oblong-rhombic, 1-papillose. <b>Sexual</b> condition dioicous; perichaetial leaves lanceolate or ovate-lanceolate, margins sometimes ciliate, costa ending near apex, laminal cells smooth or somewhat papillose. <b>Seta</b> smooth or rarely papillose. <b>Capsule</b> inclined to horizontal, curved-cylindric, asymmetric; annulus 2–4-seriate; operculum conic or rostrate from convex-conic base; endostome segments not perforate, cilia in groups of 2–4.</span><!-- -->{{Treatment/Body |distribution=North America;Mexico;West Indies;Central America;South America;Europe;Asia. |discussion=<p>Species ca. 230 (4 in the flora).</p><!-- --><p><i>Thuidium</i> is characterized by abundant, 2- or 3-pinnate paraphyllia; dioicous sexuality; dimorphic stem and branch leaves with short, thick-walled cells that are papillose abaxially and nearly always 1-papillose; stem leaves with base ± plicate and laminal cells ± uniform; apical cells of branch leaves usually truncate and multipapillose; and setae nearly always smooth. The capsule is smooth, with a short neck. The genus is treated here in a sense exclusive of <i>Abietinella</i>, <i>Cyrto-hypnum</i>, and <i>Rauiella</i> (see W. R. Buck and H. A. Crum 1990). <i>Abietinella</i> is relatively robust and has 1-pinnate branching, abundant paraphyllia, dioicous inflorescences, laminal cells 1-papillose on both surfaces, and 3- or 4-celled, brown axillary hairs. <i>Cyrto-hypnum</i> and <i>Rauiella</i> are small with autoicous inflorescences, paraphyllia short and not much branched, and laminal cells papillose on both surfaces (most commonly multipapillose). <i>Cyrto-hypnum</i> has mostly 2-pinnate branching, 2-celled axillary hairs, leaves incurved when dry, laminal cells plane, and setae often roughened. <i>Rauiella</i> has 1-pinnate branching, 3-celled axillary hairs, leaves not incurved when dry, strongly bulging laminal cells, and smooth setae.</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Stems usually 3-pinnate; branch leaf apical cell acute, smooth. |[[Thuidium tamariscinum|Thuidium tamariscinum]] |-id=key-0-1 |1 |Stems usually 2-pinnate; branch leaf apical cell truncate, multipapillose |[[#key-0-2| > 2]] |-id=key-0-2 |2 |Stem leaves incurved basally and spreading apically when dry, distinctly plicate; costae nearly filling acumen; paraphyllia papillose at cell ends. |[[Thuidium recognitum|Thuidium recognitum]] |-id=key-0-2 |2 |Stem leaves ± erect when dry, not or somewhat plicate; costae not filling acumen; paraphyllia papillose at sides of cells or cell ends |[[#key-0-3| > 3]] |-id=key-0-3 |3 |Stem leaf apices short-pointed; margins plane or sometimes reflexed basally; distal laminal cells appearing 1-3-papillose because papillae 2-fid. |[[Thuidium alleniorum|Thuidium alleniorum]] |-id=key-0-3 |3 |Stem leaf apices acuminate; margins revolute throughout; laminal cells coarsely 1-papillose, not appearing multipapillose, papillae sometimes 2-fid. |[[Thuidium delicatulum|Thuidium delicatulum]] |} </div></div><!-- -->{{#Taxon: name=Thuidium |author=Howard A. Crum† |authority=Schimper in P. Bruch and W. P. Schimper |rank=genus |parent rank=family |synonyms= |basionyms= |family=Thuidiaceae |distribution=North America;Mexico;West Indies;Central America;South America;Europe;Asia. |reference=None |publication title=in P. Bruch and W. P. Schimper, Bryol. Europ. |publication year=1852 |special status= |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V28/V28_597.xml |genus=Thuidium }}<!-- -->[[Category:Treatment]][[Category:Thuidiaceae]] Templates used on this page: Template:Thuidiaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Return to Thuidium.