View source for Chaenactis glabriuscula

{{Treatment/ID
|accepted_name=Chaenactis glabriuscula
|accepted_authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=5: 659. 1836
|year=1836
}}
|common_names=Yellow pincushion
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Chaenactis;Chaenactis sect. Chaenactis;Chaenactis glabriuscula
|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 glabriuscula]]</div></div>
|volume=Volume 21
|mention_page=page 409
|treatment_page=page 411
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>6–60 cm; proximal indument grayish to whitish, arachnoid to densely lanuginose, or glabrescent. <b>Stems</b> mostly 1–5(–12; sometimes ± horizontal); branches proximal and, often, distal. <b>Leaves</b> basal (often withering) and cauline, 1–10 cm; largest blades linear or ± elliptic, plane to 3-dimensional, succulent or not, (0–)1–2-pinnately lobed; primary lobes 1–7 pairs, remote to ± congested, ultimate lobes ± plane, involute, twisted, and/or terete. <b>Heads</b> (± radiant) mostly 1–20+ per stem. <b>Peduncles</b> 1–20(–30) cm, distally stipitate-glandular, ± villous, arachnoid-sericeous, lanuginose, and/or glabrescent. <b>Involucres</b> ± hemispheric to obconic or broadly cylindric. <b>Phyllaries</b>: longest 4.5–10 mm; outer stipitate-glandular, ± villous, arachnoid-sericeous, lanuginose, and/or glabrescent in fruit, apices erect, blunt, ± rigid. <b>Florets</b>: corollas bright to dark yellow, 4–8 mm (inner); peripheral corollas spreading, ± zygomorphic, enlarged. <b>Cypselae</b> 3–9 mm (± terete); pappi of (1–)4 scales in 1 series, or of (5–)8 scales in 2, abruptly unequal series, longest scales (1–)2–8 mm. <b>2n</b> = 12.</span><!--

-->{{Treatment/Body
|distribution=sw United States;nw Mexico.
|discussion=<p>Varieties 5 (5 in the flora).</p><!--
--><p>The diverse and intergrading forms here included in <i>Chaenactis glabriuscula</i> have been divided by P. Stockwell (1940) and subsequent workers into as many as four species and ten varieties. <i>Chaenactis glabriuscula</i> is known from the southern two-thirds of the Californian Floristic Province and adjacent desert edges. It has been reported in Massachusetts as a garden escape (variety unspecified); it is not expected to persist there outside cultivation.</p><!--
--><p>Complete interfertility among the taxa recognized here as <i>Chaenactis glabriuscula</i> vars. glabriuscula, megacephala, and lanosa was demonstrated by P. Stockwell (1940). Intraspecific crosses involving <i>C. glabriuscula </i>var.<i> orcuttiana</i> were much less successful; <i>C. glabriuscula </i>var.<i> heterocarpha</i> was not tested. As noted by W. J. Hooker and G. A. W. Arnott ([1830–]1841) and D. W. Kyhos (1965), some forms of <i>C. glabriuscula</i> differ from <i>C. stevioides</i> or <i>C. fremontii</i> only in corolla color, which can be lost in older or poorly preserved specimens.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Pappi of (5–)8 scales in 2, abruptly unequal series
|[[Chaenactis glabriuscula var. heterocarpha|Chaenactis glabriuscula var. heterocarpha]]
|-id=key-0-1
|1
|Pappi of (1–)4(–5) scales in 1 series
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Proximal indument whitish, ± densely lanuginose; leaves ± basal (persistent)
|[[Chaenactis glabriuscula var. lanosa|Chaenactis glabriuscula var. lanosa]]
|-id=key-0-2
|2
|Proximal indument grayish, ± arachnoid, or glabrescent; leaves basal (withering) and cauline
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Largest leaf blades succulent, mostly 2-pinnately lobed; stems ± horizontal
|[[Chaenactis glabriuscula var. orcuttiana|Chaenactis glabriuscula var. orcuttiana]]
|-id=key-0-3
|3
|Largest leaf blades scarcely succulent, 1(–2)-pinnately lobed; stems ascending to erect
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Longest phyllaries 7–9 × 2–3 mm, outer glabrescent in fruit; pappi: lengths of longest scales ± 0.9(–1) times corollas
|[[Chaenactis glabriuscula var. megacephala|Chaenactis glabriuscula var. megacephala]]
|-id=key-0-4
|4
|Longest phyllaries 5–7 × 1–2 mm, outer (at least medially) ± arachnoid-sericeous and, often, ± stipitate-glandular in fruit; pappi: lengths of longest scales 0.4–0.7 times corollas
|[[Chaenactis glabriuscula var. glabriuscula|Chaenactis glabriuscula var. glabriuscula]]
|}
</div></div><!--

-->{{#Taxon:
name=Chaenactis glabriuscula
|author=
|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=sw United States;nw Mexico.
|reference=None
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1836
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_1031.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Chaenactis
|section=Chaenactis sect. Chaenactis
|species=Chaenactis glabriuscula
}}<!--

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