View source for Trema

{{Treatment/ID
|accepted_name=Trema
|accepted_authority=Loureiro
|publications={{Treatment/Publication
|title=Fl. Cochinch.
|place=2: 562. 1790
|year=1790
}}
|common_names=Trema;nettletree
|basionyms=
|synonyms=
|hierarchy=Ulmaceae;Trema
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Ulmaceae]]</div><div class="higher-taxon"><small>genus</small>[[Trema]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>or shrubs, spindly, to 15 m; crowns variable. <b>Bark</b> dark brown or gray brown, smooth, shallowly furrowed, sometimes sometimes appearing warty with large, raised lenticels. <b>Branches</b> unarmed, stout; twigs hoary tomentose. <b>Leaves</b>: stipules ephemeral. <b>Leaf</b> blade: ovate, base oblique to cordate or truncate, margins crenate to serrate; venation palmate at base, pinnate on remainder of blade. <b>Inflorescences</b> cymes, compact to lax, 12-20-flowered. <b>Flowers</b> mostly unisexual, usually staminate and pistillate on same plants, appearing after leaves on new stems, in 1 series, pedicellate; calyx 5-parted. <b>Bisexual</b> flowers, if present: pedicel present; ovaries ± globose; styles persistent, 2, glabrous; stigmas 2, unbranched. <b>Staminate</b> flowers: nearly sessile; pistillodes present. <b>Pistillate</b> flowers: pedicel present; staminodes absent. <b>Fruits</b> drupes, globose, fleshy. <b>Stones</b> thick walled.</span><!--

-->{{Treatment/Body
|distribution=Tropical and subtropical regions;North America (Fla.);Mexico;West Indies;Central America;South America (to n Argentina);Asia;and Africa.
|discussion=<p>Species ca. 15 (2 in the flora).</p><!--
--><p><i>Trema</i> cannabina Loureiro and T. orientalis (Linnaeus) Blume, sometimes reported for North America, are Old World species occasionally planted but not known to have escaped from cultivation.</p><!--
--><p><i>Trema</i> species are fast-growing pioneer trees with economically important alkaloids.</p><!--
--><p><i>Trema</i> is a member of the subfamily Celtoideae. Species are locally called nettletrees in reference to their superficial resemblance to members of the Urticaceae. Further studies of variation in this group are needed in the field and in the laboratory, giving special consideration to the morphologic variants within <i>Trema micrantha</i>.</p>
|tables=
|references={{Treatment/Reference
|id=baehni1937a
|text=Baehni, C. 1937. Trema. In: J. F. MacBride et al., ed. 1936+. Flora of Peru. 6 +parts. Chicago. Part 2(2), pp. 269-270.
}}{{Treatment/Reference
|id=gardiner1965a
|text=Gardiner, R. C. 1965. Studies in the Leaf Anatomy and Geographic Distribution of Trema. M.S. thesis. University of Connecticut.
}}{{Treatment/Reference
|id=nevling1960a
|text=Nevling, L. I. Jr. 1960. Trema. In: R. E. Woodson Jr. and R. W. Schery et al., eds. 1943-1981. Flora of Panama. 41 fasc. St. Louis. [Ann. Missouri Bot. Gard. 47: 108-110.]
}}{{Treatment/Reference
|id=small1903a
|text=Small, J. K. 1903. Flora of the Southeastern United States.... New York.
}}{{Treatment/Reference
|id=standley199a
|text=Standley, P. C. 1922-1926. Trees and Shrubs of Mexico. 5 parts. Washington. Part 2, p. 199. [Contr. U.S. Natl. Herb. 23.]
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaf blade mostly longer than 5 cm, abaxially velvety white-pubescent, veins conspicuous but scarcely raised; fruits bright red-orange to yellow.
|[[Trema micrantha|Trema micrantha]]
|-id=key-0-1
|1
|Leaf blade mostly shorter than 4 cm, harshly pubescent on both surfaces, venation abaxially pronounced, raised; fruits pink.
|[[Trema lamarckiana|Trema lamarckiana]]
|}
</div></div><!--

-->{{#Taxon:
name=Trema
|author=Leila M. Schultz
|authority=Loureiro
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Ulmaceae
|distribution=Tropical and subtropical regions;North America (Fla.);Mexico;West Indies;Central America;South America (to n Argentina);Asia;and Africa.
|reference=baehni1937a;gardiner1965a;nevling1960a;small1903a;standley199a
|publication title=Fl. Cochinch.
|publication year=1790
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V3/V3_805.xml
|genus=Trema
}}<!--

-->[[Category:Treatment]][[Category:Ulmaceae]]