View source for Gamochaeta purpurea

{{Treatment/ID
|accepted_name=Gamochaeta purpurea
|accepted_authority=(Linnaeus) Cabrera
|publications={{Treatment/Publication
|title=Bol. Soc. Argent. Bot.
|place=9: 377. 1961
|year=1961
}}
|common_names=Spoon-leaf cudweed
|basionyms={{Treatment/ID/Synonym
|name=Gnaphalium purpureum
|authority=Linnaeus
}}
|synonyms={{Treatment/ID/Synonym
|name=Gamochaeta rosacea
|authority=(I. M. Johnston) Anderberg
}} {{Treatment/ID/Synonym
|name=Gnaphalium rosaceum
|authority=I. M. Johnston
}}
|hierarchy=Asteraceae;Asteraceae tribe Gnaphalieae;Gamochaeta;Gamochaeta purpurea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Gnaphalieae]]</div><div class="higher-taxon"><small>genus</small>[[Gamochaeta]]</div><div class="higher-taxon"><small>species</small>[[Gamochaeta purpurea]]</div></div>
|volume=Volume 19
|mention_page=page 431, 432, 434, 435, 437
|treatment_page=page 433
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>(sometimes winter annuals), 10–40(–50) cm; fibrous-rooted or taprooted. <b>Stems</b> erect to decumbent-ascending, densely but loosely pannose or pannose-tomentose. <b>Leaves</b> basal and cauline, basal and proximal cauline usually withering before flowering; blades oblanceolate to spatulate, 1–6 cm × 5–14 mm (distal similar, at least among proximal heads, margins sometimes sinuate), faces usually bicolor, abaxial closely white-pannose, adaxial usually sparsely arachnose (basal cells of hairs persistent, expanded, glassy), sometimes glabrescent. <b>Heads</b> initially in continuous spiciform arrays 1–4(–5) cm × (5–)10–15 mm, later interrupted (glomerules widely separated, bracteate, the proximal often on relatively long peduncles). <b>Involucres</b> turbinate-cylindric, 4–4.5 mm, bases sparsely arachnose. <b>Phyllaries</b> in 4–5 series, outer ovate-triangular, lengths 1/3–2/3 inner, apices acute-acuminate, inner triangular-lanceolate (usually striate), laminae purplish (in bud) to whitish or silvery (in fruit), apices acute (not apiculate). <b>Florets</b>: bisexual 3–4; all corollas usually purplish distally. <b>Cypselae</b> (tan) 0.6–0.7 mm. <b>2n</b> = 14, 28.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–May(–Jun).
|habitat=Open, usually disturbed, commonly sandy habitats, roadsides, fields, woodland clearings and edges
|elevation=5–300 m
|distribution=Ont.;Ala.;Ariz.;Ark. Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Va.;W.Va.;Mexico;West Indies;Central America (Nicaragua);South America;Pacific Islands (Hawaii).
|discussion=<p><i>Gamochaeta purpurea</i> apparently is native to North America and adventive elsewhere.</p><!--
--><p>Basal cells of hairs on adaxial faces of leaves are expanded and glassy (versus hairs filiform to bases in most other species) and are diagnostic for <i>Gamochaeta purpurea</i>. From Maryland northward, plants of <i>G. purpurea</i> produce relatively small basal rosettes and relatively shallow fibrous roots or a filiform taproot; southward and southwestward, the basal rosettes often are larger and the fibrous roots are denser.</p><!--
--><p><i>Gamochaeta purpurea</i> apparently occurs widely through the world as a weed; it is fairly clearly native to eastern North America, where it is the least weedy of the gamochaetas. Plants of <i>G. purpurea</i> in southern Arizona along perennial streams at the base of the Santa Catalina Mountains were first collected in 1903 (G. L. Nesom 2004) and were, perhaps, accidentally established through visitation; the same sites are heavily infested by other, more aggressive, nonnative species. Collections of <i>G. purpurea</i> also have been made at higher elevations in the Santa Catalina, Rincon, and Chiricahua mountains, where the species is less likely to have been introduced by human activity. It also seems unlikely that plants in scattered Mexican localities were introduced there by human activity.</p>
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-->{{#Taxon:
name=Gamochaeta purpurea
|author=
|authority=(Linnaeus) Cabrera
|rank=species
|parent rank=genus
|synonyms=Gamochaeta rosacea;Gnaphalium rosaceum
|basionyms=Gnaphalium purpureum
|family=Asteraceae
|phenology=Flowering Apr–May(–Jun).
|habitat=Open, usually disturbed, commonly sandy habitats, roadsides, fields, woodland clearings and edges
|elevation=5–300 m
|distribution=Ont.;Ala.;Ariz.;Ark. Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Va.;W.Va.;Mexico;West Indies;Central America (Nicaragua);South America;Pacific Islands (Hawaii).
|reference=None
|publication title=Bol. Soc. Argent. Bot.
|publication year=1961
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V19_712.xml
|tribe=Asteraceae tribe Gnaphalieae
|genus=Gamochaeta
|species=Gamochaeta purpurea
}}<!--

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