View source for Chaenactis macrantha

{{Treatment/ID
|accepted_name=Chaenactis macrantha
|accepted_authority=D. C. Eaton in S. Watson
|publications={{Treatment/Publication
|title=in S. Watson, Botany (Fortieth Parallel),
|place=171, plate 18, figs. 1–5. 1871
|year=1871
}}
|common_names=Showy or bighead dustymaidens;Mojave pincushion
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Chaenactis;Chaenactis sect. Chaenactis;Chaenactis macrantha
|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. Chaenactis]]</div><div class="higher-taxon"><small>species</small>[[Chaenactis macrantha]]</div></div>
|volume=Volume 21
|mention_page=page 400, 401, 408, 409
|treatment_page=page 410
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>5–25(–35) cm; proximal indument grayish, arachnoid-sericeous to closely lanuginose (sometimes tardily glabrescent). <b>Stems</b> mostly 1–5; branches mainly proximal. <b>Leaves</b> basal (withering) and cauline, 1.5–7 cm; largest blades ± elliptic to ovate, ± plane, not succulent, 1(–2)-pinnately lobed (± gland-dotted beneath indument); primary lobes mostly 2–5 pairs, ± remote, ultimate lobes ± plane. <b>Heads</b> (± radiant, nocturnally), mostly 1–5(–7) per stem (nodding in bud). <b>Peduncles</b> 1.5–8 cm, arachnoid-sericeous to thinly lanuginose distally, not stipitate-glandular. <b>Involucres</b> ± obconic to broadly cylindric. <b>Phyllaries</b>: longest 12–18 mm; outer arachnoid-sericeous to thinly lanuginose in fruit, not stipitate-glandular, apices ± squarrose, blunt, pliant. <b>Florets</b>: corollas (nocturnal) white to pinkish or cream, 9–12(–15) mm (lengths 1.8–2.2 times cypselae; anthers ± included); peripheral corollas nocturnally spreading, actinomorphic, scarcely enlarged. <b>Cypselae</b> 5–6(–7) mm; pappi of 8 scales in 2, abruptly unequal series, longest scales 5–7 mm. <b>2n</b> = 12.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–early Jul.
|habitat=Open, loose, light-colored, silty, usually calcareous or alkaline, desert soils, often covered by or mixed with gravel
|elevation=600–2200 m
|distribution=Ariz.;Calif.;Idaho;Nev.;Oreg.;Utah.
|discussion=<p>Though the derived floral features of <i>Chaenactis macrantha</i> obscure its relationships, it may represent a link between sect. <i>Chaenactis</i> (annuals; pappus scales in regular, often strongly reduced series) and sect. Macrocarphus (leaf blades gland-dotted). Resemblance of its heads, leaves, and indument to those of <i>C. thompsonii</i> and relatives is striking. It appears to form no natural hybrids, perhaps because of its nocturnal corollas.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Chaenactis macrantha
|authority=D. C. Eaton in S. Watson
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Mar–early Jul.
|habitat=Open, loose, light-colored, silty, usually calcareous or alkaline, desert soils, often covered by or mixed with gravel
|elevation=600–2200 m
|distribution=Ariz.;Calif.;Idaho;Nev.;Oreg.;Utah.
|reference=None
|publication title=in S. Watson, Botany (Fortieth Parallel),
|publication year=1871
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_1027.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Chaenactis
|section=Chaenactis sect. Chaenactis
|species=Chaenactis macrantha
}}<!--

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