View source for Erigeron porsildii

{{Treatment/ID
|accepted_name=Erigeron porsildii
|accepted_authority=G. L. Nesom & D. F. Murray
|publications={{Treatment/Publication
|title=Sida
|place=21: 44. 2004
|year=2004
}}
|common_names=Porsild’s Arctic fleabane
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Erigeron grandiflorus subsp. arcticus
|authority=A. E. Porsild
|rank=subspecies
|publication_title=Publ. Bot. (Ottawa)
|publication_place=4: 67. 1975,
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Erigeron;Erigeron porsildii
|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 porsildii]]</div></div>
|volume=Volume 20
|mention_page=page 267, 325
|treatment_page=page 324
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> (2–)10–20(–25) cm; rhizomatous, fibrous-rooted, rhizomes horizontal or erect, sometimes branched, relatively short, sometimes resembling taproots. <b>Stems</b> erect, sparsely to moderately villous (hairs 0.5–1.6 mm), usually stipitate-glandular (hairs 0.05–0.4 mm). <b>Leaves</b> basal (persistent) and cauline; basal blades oblong-oblanceolate to narrowly obovate, 30–120 × (3–)5–14 mm, margins entire (apices acute), faces densely hirsute to coarsely villous, sparsely stipitate-glandular to minutely glandular; cauline blades oblong-lanceolate to lanceolate, gradually reduced distally or nearly equal-sized (bases often subclasping). <b>Heads</b> 1. <b>Involucres</b> 6–10 × 12–20 mm. <b>Phyllaries</b> in ca. 2 series (purple at least at tips, narrowly lanceolate, equal, apically acuminate), densely hirsute, hirsuto-villous, or villous (hairs whitish, cross walls not colored), sparsely stipitate-glandular to minutely glandular. <b>Ray</b> florets 65–110; corollas white to lavender or blue, 13–17 mm (1.2–1.7 mm wide), laminae weakly coiling. <b>Disc</b> corollas 3.8–4.5 mm. <b>Cypselae</b> 2–2.5 mm, 2-nerved, faces sparsely strigose; pappi: outer of relatively long setae or scales, inner of 14–20(–25) bristles. <b>2n</b> = 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering (Jun–)Jul–Aug(–Sep).
|habitat=Cliffs and talus (often calcareous) slopes, shaley gravel, grassy ravines, dry tundra
|elevation=600–2100 m
|distribution=N.W.T.;Yukon;Alaska.
|discussion=<p><i>Erigeron</i> hultenii S. A. Spongberg was noted to be “closely allied to the polymorphic arctic-alpine species <i>E. grandiflorus</i> W. J. Hooker” (S. A. Spongberg 1973, p. 116) and to have a “close morphologic resemblance to some plants of <i>E. grandiflorus</i> from Alaska” [<i>E. porsildii</i> in the present sense] (p. 119). Plants corresponding to E. hultenii have not been recollected, and that taxon does not fit with any other known Alaskan species. Contrasts with <i>E. porsildii</i> exclude it from that species. <i>Erigeron</i> hultenii is not recognized formally herein.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Erigeron porsildii
|authority=G. L. Nesom & D. F. Murray
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Erigeron grandiflorus subsp. arcticus
|family=Asteraceae
|phenology=Flowering (Jun–)Jul–Aug(–Sep).
|habitat=Cliffs and talus (often calcareous) slopes, shaley gravel, grassy ravines, dry tundra
|elevation=600–2100 m
|distribution=N.W.T.;Yukon;Alaska.
|reference=None
|publication title=Sida
|publication year=2004
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_730.xml
|tribe=Asteraceae tribe Astereae
|genus=Erigeron
|species=Erigeron porsildii
}}<!--

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