View source for Thelia

{{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://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V28/V28_1000.xml
|genus=Thelia
}}<!--

-->[[Category:Treatment]][[Category:Theliaceae]]