View source for Artemisia tridentata

{{Treatment/ID
|accepted_name=Artemisia tridentata
|accepted_authority=Nuttall
|publications={{Treatment/Publication
|title=Trans. Amer. Philos. Soc., n. s.
|place=7: 398. 1841
|year=1841
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Seriphidium tridentatum
|authority=(Nuttall) W. A. Weber
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Anthemideae;Artemisia;Artemisia subg. Tridentatae;Artemisia tridentata
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Anthemideae]]</div><div class="higher-taxon"><small>genus</small>[[Artemisia]]</div><div class="higher-taxon"><small>subgenus</small>[[Artemisia subg. Tridentatae]]</div><div class="higher-taxon"><small>species</small>[[Artemisia tridentata]]</div></div>
|volume=Volume 19
|mention_page=page 407, 510, 511, 512, 515, 5
|treatment_page=page 516
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> 40–200(–300) cm (herbage gray-haired), aromatic; not root-sprouting (trunks relatively thick). <b>Stems</b> gray-brown, glabrate (bark gray, exfoliating in strips). <b>Leaves</b> persistent, gray-green; blades usually cuneate, (0.4–)0.5–3.5 × 0.1–0.7 cm, 3-lobed (lobes to 1/3 blade lengths, 1.5+ mm wide, rounded), faces densely hairy. <b>Heads</b> (usually erect, on slender peduncles) in paniculiform arrays 5–30 × 1–6 cm. <b>Involucres</b> lanceolate, (1–)1.5–4 × 1–3 mm. <b>Phyllaries</b> oblanceolate to widely obovate, densely tomentose. <b>Florets</b> 3–8; corollas 1.5–2.5 mm, glabrous. <b>Cypselae</b> 1–2 mm, hairy or glabrous, glandular.</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Ariz.;Calif.;Colo.;Idaho;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Oreg.;S.Dak.;Utah;Wash.;Wyo.;nw Mexico.
|discussion=<p>Subspecies 4 (4 in the flora).</p><!--
--><p><i>Artemisia tridentata</i> has undergone considerable taxonomic revision in the past century and circumscription of subspecies remains a topic of considerable controversy. Workers in the field should be aware of the morphologic variation within the subspecies across the range of the species (i.e., approximately from the Sierra <i>Nevada</i> in the west to the plains of the Rocky Mountains in the east). Because rangeland managers and conservationists can often identify local morphologic and chemical races based on grazing or habitat preferences of wildlife and domestic animals, some impetus exists to further subdivide the subspecies within <i>A. tridentata</i> at the varietal level. This treatment of the species complex remains conservative in light of the need for further study. As to chemical differences among the subspecies, aroma is often used to distinguish subspecies in the field. Volatile resins in the plants are strongly aromatic and, when crushed, leaves have very distinctive (although not easily described) aromas.</p>
|tables=
|references={{Treatment/Reference
|id=arthur1984a
|text=Arthur, E. D. 1984. Natural and artificial hybridization among Artemisia tridentata populations. [Abstract.] Amer. J. Bot. 71(suppl.): 105
}}{{Treatment/Reference
|id=arthur1988a
|text=Arthur, E. D., B. L. Welch, and S. C. Sanderson. 1988. Natural and artificial hybridization between big sagebrush (Artemisia tridentata) subspecies. J. Heredity 79: 268–276.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Shrubs 100–200(–300) cm (leaf blades: lengths usually 3+ times widths); heads in relatively broad, paniculiform arrays
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Shrubs 30–150 cm (leaf blades: lengths usually less than 3 times widths); heads in relatively narrow, paniculiform arrays
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Involucres 1.5–2.5 × 1–2 mm; deep, well drained (usually sandy) soils in valley bottoms, lower montane slopes along drainages
|[[Artemisia tridentata subsp. tridentata|Artemisia tridentata subsp. tridentata]]
|-id=key-0-2
|2
|Involucres 2–4 × 1–2 mm; loose, sandy soils of valleys and foothills
|[[Artemisia tridentata subsp. parishii|Artemisia tridentata subsp. parishii]]
|-id=key-0-3
|3
|Shrubs, 60–80(–150) cm (crowns flat-topped); heads in arrays 10–15 cm; involucres 2–3 × 1.5–3 mm; mountains
|[[Artemisia tridentata subsp. vaseyana|Artemisia tridentata subsp. vaseyana]]
|-id=key-0-3
|3
|Shrubs, 30–50(–150) cm (crowns rounded); heads in arrays 2–6(–8) cm; involucres (1–)1.5–2 × 1.5–2 mm; usually cold-desert basins and high plateaus, sometimes foothills
|[[Artemisia tridentata subsp. wyomingensis|Artemisia tridentata subsp. wyomingensis]]
|}
</div></div><!--

-->{{#Taxon:
name=Artemisia tridentata
|authority=Nuttall
|rank=species
|parent rank=subgenus
|synonyms=Seriphidium tridentatum
|basionyms=
|family=Asteraceae
|distribution=Alta.;B.C.;Ariz.;Calif.;Colo.;Idaho;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Oreg.;S.Dak.;Utah;Wash.;Wyo.;nw Mexico.
|reference=arthur1984a;arthur1988a
|publication title=Trans. Amer. Philos. Soc., n. s.
|publication year=1841
|special status=Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_876.xml
|tribe=Asteraceae tribe Anthemideae
|genus=Artemisia
|subgenus=Artemisia subg. Tridentatae
|species=Artemisia tridentata
}}<!--

-->[[Category:Treatment]][[Category:Artemisia subg. Tridentatae]]