View source for Thuja

{{Treatment/ID
|accepted_name=Thuja
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 1002. 1753; Gen. Pl. ed. 5, 435, 1754
|year=1754
}}
|common_names=Arborvitae;thuya;cèdre
|basionyms=
|synonyms=
|hierarchy=Cupressaceae;Thuja
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cupressaceae]]</div><div class="higher-taxon"><small>genus</small>[[Thuja]]</div></div>
|etymology=Greek name for some evergreen, resinous trees
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>evergreen, small to large. <b>Branchlets</b> flattened, in fan-shaped, flattened, frondlike sprays. <b>Leaves</b> opposite in 4 ranks. <b>Adult</b> leaves heteromorphic; those on larger branchlets with sharp, erect, free apices to ca. 2 mm; those on flattened lateral branchlets crowded, appressed, scalelike, lateral pairs keeled, facial pairs flat; abaxial glands present or absent. <b>Pollen</b> cones with 2–6 pairs of sporophylls, each sporophyll with 2–4 pollen sacs. <b>Seed</b> cones maturing and opening first year, ellipsoid, (6–)9–14(–18) mm; scales persistent, 4–6 pairs, overlapping, oblong and basifixed, thin and woody, 2–3 central pairs fertile, uniformly thin or with slightly enlarged apex, remaining scales sterile. <b>Seeds</b> 1–3 per scale, lenticular, equally 2-winged; cotyledons 2. <b>x</b> = 11.</span><!--

-->{{Treatment/Body
|distribution=North America;e Asia.
|discussion=<p>Two Asiatic species, <i>Thuja</i> koraiensis Nakai (Korean arborvitae) and T. standishii (Gordon) Carrière (Japanese arborvitae), are occasional in cultivation. They differ from the native species in having more closely spaced long-shoot leaves with shorter, spreading points.</p><!--
--><p>Species 5 (2 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Foliage dull yellowish green abaxially and adaxially; seed-cone scales minutely mucronate; e United States and e Canada.
|[[Thuja occidentalis|Thuja occidentalis]]
|-id=key-0-1
|1
|Foliage white-striped abaxially when fresh, glossy green adaxially; seed-cone scales with evident, nearly terminal, deltate projection; w United States and w Canada.
|[[Thuja plicata|Thuja plicata]]
|}
</div></div><!--

-->{{#Taxon:
name=Thuja
|author=Kenton L. Chambers
|authority=Linnaeus
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Cupressaceae
|distribution=North America;e Asia.
|reference=None
|publication title=Sp. Pl.
|publication year=1754
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_793.xml
|genus=Thuja
}}<!--

-->[[Category:Treatment]][[Category:Cupressaceae]]