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, Thuja 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://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_793.xml
|genus=Thuja
}}<!--

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