View source for Chaenactis alpigena

{{Treatment/ID
|accepted_name=Chaenactis alpigena
|accepted_authority=Sharsmith
|publications={{Treatment/Publication
|title=Contr. Dudley Herb.
|place=4: 319, plate 12, fig. a. 1955
|year=1955
}}
|common_names=Sharsmith or southern Sierra or mountain pincushion
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Chaenactis;Chaenactis sect. Macrocarphus;Chaenactis alpigena
|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. Macrocarphus]]</div><div class="higher-taxon"><small>species</small>[[Chaenactis alpigena]]</div></div>
|volume=Volume 21
|mention_page=page 404, 405
|treatment_page=page 408
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 2–7 cm (cespitose or ± matted); proximal indument thinning with age, grayish to yellowish, lanuginose (sometimes glabrescent). <b>Stems</b> mostly 5–15+, erect to prostrate. <b>Leaves</b> basal, 1–2.5(–3.5) cm; largest blades linear or broadly elliptic to slightly obovate, ± plane or 3-dimensional, (0–)1–2-pinnately or -subpalmately lobed; primary lobes 2–7 pairs, ± congested, ultimate lobes ± plane to involute and twisted. <b>Heads</b> 1 per stem. <b>Peduncles</b> mostly prostrate, (0.5–)2–7(–10) cm. <b>Involucres</b> obconic to ± cylindric. <b>Phyllaries</b>: longest 9–14 mm; outer ± lanuginose, not stipitate-glandular, apices erect, ± rigid. <b>Corollas</b> 5.5–8 mm. <b>Cypselae</b> 5–8 mm (eglandular); pappi: longest scales 5–8 mm (lengths 0.9–1 times corollas).</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Sep.
|habitat=Open, loose, subalpine to alpine granitic sand, gravel, scree
|elevation=2200–3900 m
|distribution=Calif.;Nev.
|discussion=<p><i>Chaenactis alpigena</i> is known from the central and southern Sierra <i>Nevada</i> and adjacent northern White Mountains. It is sometimes cultivated in rock gardens and may be found beyond its native range. It appears to be sister to <i>C. thompsonii</i> and/or <i>C. evermannii</i>.</p><!--
--><p><i>Chaenactis alpigena</i> shows clinal variation; northward the leaves tend to be ± plane, (0–)1-subpalmately lobed, lobes 2–5 pairs, ± plane; southward the leaves tend to be ± 3-dimensional, 1–2-pinnately lobed, primary lobes 4–7 pairs, ultimate lobes ± involute, twisted. Leaves of intermediate forms tend to be ± plane, 1-pinnately lobed, lobes mostly 4–5 pairs, ± plane. The variation is gradual and does not support recognition of infraspecific taxa. Throughout its range, occasional plants of <i>C. alpigena</i> are green and glabrate.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Chaenactis alpigena
|author=
|authority=Sharsmith
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Jul–Sep.
|habitat=Open, loose, subalpine to alpine granitic sand, gravel, scree
|elevation=2200–3900 m
|distribution=Calif.;Nev.
|reference=None
|publication title=Contr. Dudley Herb.
|publication year=1955
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_1025.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Chaenactis
|section=Chaenactis sect. Macrocarphus
|species=Chaenactis alpigena
}}<!--

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