Difference between revisions of "Chaenactis douglasii"
Bot. Beechey Voy., 354. 1839.
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|name=Hymenopappus douglasii | |name=Hymenopappus douglasii | ||
|authority=Hooker | |authority=Hooker | ||
| + | |rank=species | ||
|publication_title=Fl. Bor.-Amer. | |publication_title=Fl. Bor.-Amer. | ||
|publication_place=1: 316. 1833 | |publication_place=1: 316. 1833 | ||
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|name=Macrocarphus douglasii | |name=Macrocarphus douglasii | ||
|authority=(Hooker) Nuttall | |authority=(Hooker) Nuttall | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Chaenactis;Chaenactis sect. Macrocarphus;Chaenactis douglasii | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Chaenactis;Chaenactis sect. Macrocarphus;Chaenactis douglasii | ||
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|distribution=North America. | |distribution=North America. | ||
|discussion=<p>Varieties 2 (2 in the flora).</p><!-- | |discussion=<p>Varieties 2 (2 in the flora).</p><!-- | ||
| − | --><p><i>Chaenactis douglasii</i> is widespread and variable (see discussion under < | + | --><p><i>Chaenactis douglasii</i> is widespread and variable (see discussion under <i></i>var.<i> douglasii</i>).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Chaenactis douglasii | name=Chaenactis douglasii | ||
| − | |||
|authority=(Hooker) Hooker & Arnott | |authority=(Hooker) Hooker & Arnott | ||
|rank=species | |rank=species | ||
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|publication year=1839 | |publication year=1839 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_1019.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | ||
Revision as of 19:32, 16 December 2019
Biennials or perennials, (2–)5–50(–60) cm (rarely slightly woody or flowering first year, sometimes cespitose or ± matted); proximal indument thinning with age, grayish, mostly arachnoid-sericeous to thinly lanuginose. Stems 1–25+, erect to spreading. Leaves basal, or basal (sometimes withering) and ± cauline, (1–)2–12(–15) cm; largest blades ± elliptic or slightly lanceolate to ovate, ± 3-dimensional, usually 2-pinnately lobed; primary lobes (4–)5–9(–12) pairs, ± congested, scarcely imbricate, ultimate lobes ± involute and/or twisted. Heads 1–25+ per stem. Peduncles mostly ascending to erect, 1–10 cm. Involucres obconic to ± hemispheric. Phyllaries: longest 9–15(–17) mm; outer usually stipitate-glandular (sometimes sparsely or obscurely, rarely eglandular) and, often, arachnoid to lanuginose and, sometimes, sparsely villous, apices usually ± squarrose, pliant. Corollas 5–8 mm. Cypselae 5–8 mm (usually sparsely glandular amidst other indument); pappi: longest scales 3–6 mm.
Distribution
North America.
Discussion
Varieties 2 (2 in the flora).
Chaenactis douglasii is widespread and variable (see discussion under var. douglasii).
Selected References
None.
Key
| 1 | Leaves basal (sometimes withering) and ± cauline; plants not or scarcely cespitose, not matted; stems usually 1–5(–12); heads (1–)2–25+ per stem | Chaenactis douglasii var. douglasii |
| 1 | Leaves strictly basal; plants cespitose or ± matted; stems (1–)10–25+; heads 1(–2) per stem | Chaenactis douglasii var. alpina |