View source for Thelia ← Thelia 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=Thelia |accepted_authority=Sullivant in A. Gray |publications={{Treatment/Publication |title=in A. Gray, Manual ed. |place=2, 660. 1856 |year=1856 }} |basionyms= |synonyms= |hierarchy=Theliaceae;Thelia |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Theliaceae]]</div><div class="higher-taxon"><small>genus</small>[[Thelia]]</div></div> |etymology=Greek thele, nipple, alluding to prominent leaf papillae |volume=Volume 28 |mention_page=page 637, 639, 648 |treatment_page=page 638 }}<!-- --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>small to medium-sized. <b>Stems</b> 1-pinnate or irregularly branched, branches erect-ascending, simple or irregularly branched; epidermal cells elongate; rhizoids reddish brown, densely branched, smooth. <b>Leaves</b> deltoid-ovate; base decurrent; apex broadly acute to obtuse, abruptly contracted, acumen long, apiculate or piliferous; costa single or sometimes double, 1/2–3/4 leaf length, sometimes spurred or 2-fid; alar cells quadrate or subrectangular; laminal cells rhombic to fusiform, stoutly 1-papillose abaxially, papillae columnar, simple or 3–6-branched. <b>Seta</b> yellowish when young, red when mature, flexuose when dry, smooth. <b>Capsule</b> cylindric to ovoid-cylindric, symmetric to somewhat curved, smooth to weakly wrinkled when dry; exothecial cells at mouth oblate to quadrate, proximal cells quadrate to short-rectangular, enlarged, red, walls thin to thick; stomata on neck; annulus rudimentary, persistent, 2- or 3-seriate, cell walls thin; operculum conic-subulate; exostome teeth united at base on short, smooth membrane, white, linear, external surface smooth basally, finely papillose distally, trabeculae and median line thickened, internal surface lightly papillose, trabeculae weak; endostome rudimentary, white, lightly papillose, basal membrane low or high, segments reduced to stubs or to 1/2 exostome length, cilia 1 or 2, nublike or absent. <b>Spores</b> smooth to lightly papillose.</span><!-- -->{{Treatment/Body |distribution=North America;ne Mexico;West Indies (Dominican Republic). |discussion=<p>Species 3 (3 in the flora).</p><!-- --><p><i>Thelia</i> is remarkable in its glaucous, bluish green color, thick, densely tomentose mats, and tumid to julaceous stems and branches. The stem leaves are distinctively deltoid-ovate with rhombic cells, simple or 3–6-branched columnar papillae, and frequently long-ciliate margins. The sporophyte has a long seta and typically erect, symmetric, cylindric to ovoid-cylindric capsules. The diplolepidous peristome is yellowish white. The endostome segments and cilia are often reduced to nublike projections on a low or high basal membrane.</p><!-- --><p>In the field, <i>Thelia</i> could be confused with <i>Myurella</i> (Pterigynandraceae) because both genera have terete-foliate stems and branches that occur in mats or cushions, radiculose stems, and a similar color. <i>Myurella</i> rarely occurs in dense mats, and its leaves have short, double costae, serrate or sinuate-dentate margins, and lower, unbranched papillae.</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Stem leaf laminal cell papillae simple. |[[Thelia hirtella|Thelia hirtella]] |-id=key-0-1 |1 |Stem leaf laminal cell papillae usually 3-6-branched |[[#key-0-2| > 2]] |-id=key-0-2 |2 |Stems creeping, densely and regularly 1-pinnate, often densely tomentose, branches simple; leaf acumina usually spreading-piliferous. |[[Thelia asprella|Thelia asprella]] |-id=key-0-2 |2 |Stems often ascending, sparsely and irregularly branched, lightly tomentose, branches irregularly branched; leaf acumina erect, apiculate. |[[Thelia lescurii|Thelia lescurii]] |} </div></div><!-- -->{{#Taxon: name=Thelia |authority=Sullivant in A. Gray |rank=genus |parent rank=family |synonyms= |basionyms= |family=Theliaceae |distribution=North America;ne Mexico;West Indies (Dominican Republic). |reference=None |publication title=in A. Gray, Manual ed. |publication year=1856 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V28/V28_1000.xml |genus=Thelia }}<!-- -->[[Category:Treatment]][[Category:Theliaceae]] Templates used on this page: Template:Theliaceae (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 Thelia.