View source for Chaenactis artemisiifolia

{{Treatment/ID
|accepted_name=Chaenactis artemisiifolia
|accepted_authority=(Harvey & A. Gray) A. Gray
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=10: 74. 1874
|year=1874
}}
|common_names=White pincushion
|basionyms={{Treatment/ID/Basionym
|name=Acarphaea artemisiifolia
|authority=Harvey & A. Gray
|publication_title=Mem. Amer. Acad. Arts, n. s.
|publication_place=4: 98. 1849 (as artemisiaefolia)
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Chaenactis;Chaenactis sect. Acarphaea;Chaenactis artemisiifolia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Chaenactidinae]]</div><div class="higher-taxon"><small>genus</small>[[Chaenactis]]</div><div class="higher-taxon"><small>section</small>[[Chaenactis sect. Acarphaea]]</div><div class="higher-taxon"><small>species</small>[[Chaenactis artemisiifolia]]</div></div>
|volume=Volume 21
|mention_page=page 411
|treatment_page=page 402
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>(15–)25–90(–200) cm. <b>Leaves</b> basal (withering) and cauline, 3–15(–20) cm; largest blades ± plane, not succulent; primary lobes mostly 5–10 pairs, ultimate lobes ± crowded, antrorse, lanceolate to elliptic, plane. <b>Peduncles</b> 1.5–6 cm. <b>Involucres</b> ± hemispheric, mostly 10–15 mm diam. <b>Phyllaries</b>: longest 7–10(–12) mm, ± densely villous, not or sparsely glandular; apices (all) erect, ± green, acute or scarcely acuminate, not aristate, ± plane. <b>Receptacles</b>: paleae 0. <b>Corollas</b> 5–7 mm. <b>Cypselae</b> compressed, 4–7 mm; pappi 0 or coroniform (of ± 10 scales, longest 0.1–0.5 mm). <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–early Jul.
|habitat=Dry canyons, open slopes, often over granitoid rocks, locally abundant in chaparral burns or other recovering disturbances
|elevation=80–1600 m
|distribution=Calif.;Mexico (Baja California).
|discussion=<p>In the flora area, <i>Chaenactis artemisiifolia</i> is known from the Transverse and Peninsular ranges and seaward valleys of southwestern California. It is fire-adapted; its germination is significantly enhanced by exposure to biomass smoke (J. E. Keeley and C. J. Fotheringham 1998).</p><!--
--><p><i>Chaenactis</i> lacera Greene, the eighteenth species of the genus, is known from coastal portions (including islands) of the western Vizcaíno Desert in Baja California and Baja California Sur, Mexico. Forms of <i>C. artemisiifolia</i> sometimes resemble <i>C. lacera</i> in coastal southern California (P. Stockwell 1940), where <i>C. lacera</i> could eventually be introduced. Besides the key characteristics above, <i>C. lacera</i> differs from <i>C. artemisiifolia</i> by its largest leaf blades broadly ± elliptic, 2–3-pinnately lobed, ultimate lobes remote, recurved to retrorse, ± linear, involute (leaf blades appearing ± skeletal).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Chaenactis artemisiifolia
|author=
|authority=(Harvey & A. Gray) A. Gray
|rank=species
|parent rank=section
|synonyms=
|basionyms=Acarphaea artemisiifolia
|family=Asteraceae
|phenology=Flowering Apr–early Jul.
|habitat=Dry canyons, open slopes, often over granitoid rocks, locally abundant in chaparral burns or other recovering disturbances
|elevation=80–1600 m
|distribution=Calif.;Mexico (Baja California).
|reference=None
|publication title=Proc. Amer. Acad. Arts
|publication year=1874
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_1011.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Chaenactis
|section=Chaenactis sect. Acarphaea
|species=Chaenactis artemisiifolia
}}<!--

-->[[Category:Treatment]][[Category:Chaenactis sect. Acarphaea]]