View source for Erigeron caespitosus

{{Treatment/ID
|accepted_name=Erigeron caespitosus
|accepted_authority=Nuttall
|publications={{Treatment/Publication
|title=Trans. Amer. Philos. Soc., n. s.
|place=7: 307. 1840
|year=1840
}}
|common_names=Tufted fleabane
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Erigeron;Erigeron caespitosus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Erigeron]]</div><div class="higher-taxon"><small>species</small>[[Erigeron caespitosus]]</div></div>
|volume=Volume 20
|mention_page=page 21, 274, 284, 289
|treatment_page=page 283
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 5–25(–30) cm; taprooted, caudices relatively thick, usually branched. <b>Stems</b> decumbent-ascending (greenish proximally), usually densely hirsute to hirtellous (hairs spreading to deflexed, gradually attenuate, basal cells erect), sometimes strigose (in Saskatchewan and Yukon), eglandular. <b>Leaves</b> basal (persistent) and cauline; basal blades (1–)3-nerved, narrowly oblanceolate to spatulate, (10–)20–90(–120) × 2–15 mm, margins entire (apices rounded to obtuse), faces densely hirtellous, eglandular; cauline blades oblong-ovate to linear, ± reduced distally. <b>Heads</b> 1–4 (branches from distal 1/2 of stem). <b>Involucres</b> 4–7 × 9–18 mm. <b>Phyllaries</b> in 3–4 series, densely hirsuto-canescent to hirtellous (hairs spreading), moderately minutely glandular. <b>Ray</b> florets 30–100; corollas white to bluish, 5–15 mm, laminae coiling. <b>Disc</b> corollas 3–4.4 mm. <b>Cypselae</b> 1.7–2.2 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae or scales, inner of 15–25 bristles. <b>2n</b> = 18, 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Rocky or sandy, grassy hills, sagebrush-aspen, pinyon-juniper, to spruce and tundra northward
|elevation=1300–3000(–3600) m
|distribution=Alta.;B.C.;Man.;Sask.;Yukon;Alaska;Ariz.;Colo.;Idaho;Mont.;Nebr.;N.Mex.;N.Dak.;S.Dak.;Utah;Wash.;Wyo.
|discussion=<p><i>Erigeron caespitosus</i> as recognized here is highly variable and perhaps justifiably could be divided into more than one taxon. Plants at lower elevations tend to produce tall stems branching above the middle and long, white rays. At higher elevations, especially in Idaho, western Montana, Utah, and Wyoming, stems tend to be shorter and simple and the rays commonly are blue to violet. In the Bitterroot Mountains (Ravalli and Deerlodge counties, Montana), short-stemmed, blue-rayed plants also have strigose cauline vestiture (in contrast to typically deflexed-hirtellous stems); these vestiture variants occur in the same area with plants apparently similar in all other features. Strigose populational variants also occur in Saskatchewan and Yukon, and <i>E. abajoensis</i>, largely distinguished by strigose cauline vestiture, might be considered a regional variant of <i>E. caespitosus</i>. In eastern Idaho and southwestern Montana, plants of <i>E. caespitosus</i> are commonly encountered with cauline leaves obovate and distinctly subclasping. Plants with strongly 3-nerved basal leaves occur in Carbon and Gallatin counties, Montana.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Erigeron caespitosus
|authority=Nuttall
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Jun–Aug.
|habitat=Rocky or sandy, grassy hills, sagebrush-aspen, pinyon-juniper, to spruce and tundra northward
|elevation=1300–3000(–3600) m
|distribution=Alta.;B.C.;Man.;Sask.;Yukon;Alaska;Ariz.;Colo.;Idaho;Mont.;Nebr.;N.Mex.;N.Dak.;S.Dak.;Utah;Wash.;Wyo.
|reference=None
|publication title=Trans. Amer. Philos. Soc., n. s.
|publication year=1840
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V19-20-21/V20_580.xml
|tribe=Asteraceae tribe Astereae
|genus=Erigeron
|species=Erigeron caespitosus
}}<!--

-->[[Category:Treatment]][[Category:Erigeron]]