View source for Erigeron tweedyi

{{Treatment/ID
|accepted_name=Erigeron tweedyi
|accepted_authority=Canby
|publications={{Treatment/Publication
|title=Bot. Gaz.
|place=13: 17. 1888
|year=1888
}}
|common_names=Tweedy’s fleabane
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Erigeron;Erigeron tweedyi
|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 tweedyi]]</div></div>
|volume=Volume 20
|mention_page=page 275
|treatment_page=page 304
}}<!--

--><span class="statement" id="st-d0_s0" data-properties=""><b>Perennials,</b> 4–20 cm;</span> <span class="statement" id="st-d0_s1" data-properties="whole-organism some measurement;whole-organism architecture;whole-organism duration;caudex height or length or size;caudex width;crown architecture;crown height or length or size;crown width;branch architecture;branch height or length or size;branch width">taprooted, caudices multicipital crowns or branches relatively short and thick.</span> <span class="statement" id="st-d0_s2" data-properties="stem orientation;stem pubescence;stem architecture"><b>Stems </b>erect to ascending or decumbent-prostrate, densely strigose (hairs relatively thin), eglandular.</span> <span class="statement" id="st-d0_s3" data-properties="leaf position;leaf position"><b>Leaves </b>basal (persistent) and cauline;</span> <span class="statement" id="st-d0_s4" data-properties="basal blade shape;basal blade arrangement or shape;basal blade length;basal blade width;cauline blade size;margin architecture or shape;face pubescence;face architecture">basal (silvery) blades spatulate, broadly elliptic, 50–250 × 5–13 mm, cauline abruptly reduced distally, margins entire, faces densely strigoso-sericeous (hairs gray-white), eglandular.</span> <span class="statement" id="st-d0_s5" data-properties="head quantity"><b>Heads </b>1–4.</span> <span class="statement" id="st-d0_s6" data-properties="involucre length;involucre width"><b>Involucres </b>4–6 × 9–14 mm.</span> <span class="statement" id="st-d0_s7" data-properties="phyllarie pubescence;phyllarie architecture or function or pubescence;series quantity"><b>Phyllaries </b>in 3–4 series, finely hirsuto-strigose, sparsely minutely glandular.</span> <span class="statement" id="st-d0_s8" data-properties="ray-floret quantity"><b>Ray-</b>florets 20–50;</span> <span class="statement" id="st-d0_s9" data-properties="corolla coloration;corolla coloration;corolla some measurement;lamina shape;lamina orientation">corollas blue to purple, sometimes white, 5–9 mm, laminae not coiling or reflexing.</span> <span class="statement" id="st-d0_s10" data-properties="disc corolla some measurement"><b>Disc </b>corollas 3.1–4.3 mm.</span> <span class="statement" id="st-d0_s11" data-properties="cypsela some measurement;cypsela architecture;face pubescence"><b>Cypselae </b>2–2.5 mm, 2-nerved, faces strigoso-sericeous;</span> <span class="statement" id="st-d0_s12" data-properties="bristle quantity">pappi: outer of setae, inner of 20–30 bristles.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Clay hills, rocky slopes, limestone taluses, shale outcrops, sagebrush-grasslands
|elevation=(1300–)1600–3000 m
|distribution=Idaho;Mont.;Wyo.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Erigeron tweedyi
|authority=Canby
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Jun–Aug.
|habitat=Clay hills, rocky slopes, limestone taluses, shale outcrops, sagebrush-grasslands
|elevation=(1300–)1600–3000 m
|distribution=Idaho;Mont.;Wyo.
|reference=None
|publication title=Bot. Gaz.
|publication year=1888
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20_654.xml
|tribe=Asteraceae tribe Astereae
|genus=Erigeron
|species=Erigeron tweedyi
|basal blade arrangement or shape=elliptic
|basal blade length=50mm;250mm
|basal blade shape=spatulate
|basal blade width=5mm;13mm
|branch architecture=multicipital
|branch height or length or size=short
|branch width=thick
|bristle quantity=20;30
|caudex height or length or size=short
|caudex width=thick
|cauline blade size=reduced
|corolla coloration=white;blue;purple
|corolla some measurement=5mm;9mm
|crown architecture=multicipital
|crown height or length or size=short
|crown width=thick
|cypsela architecture=2-nerved
|cypsela some measurement=2mm;2.5mm
|disc corolla some measurement=3.1mm;4.3mm
|face architecture=eglandular
|face pubescence=strigoso-sericeous;strigoso-sericeous
|head quantity=1;4
|involucre length=4mm;6mm
|involucre width=9mm;14mm
|lamina orientation=reflexing
|lamina shape=not coiling
|leaf position=cauline;basal
|margin architecture or shape=entire
|phyllarie architecture or function or pubescence=glandular
|phyllarie pubescence=hirsuto-strigose
|ray-floret quantity=20;50
|series quantity=3;4
|stem architecture=eglandular
|stem orientation=erect;ascending or decumbent-prostrate
|stem pubescence=strigose
|whole-organism architecture=taprooted
|whole-organism duration=perennial
|whole-organism some measurement=4cm;20cm
}}<!--

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