Difference between revisions of "Packera cynthioides"
Phytologia 49: 46. 1981.
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|common_names=White Mountain ragwort | |common_names=White Mountain ragwort | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Senecio cynthioides | |name=Senecio cynthioides | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
|publication_title=Leafl. Bot. Observ. Crit. | |publication_title=Leafl. Bot. Observ. Crit. | ||
|publication_place=1: 212. 1906 | |publication_place=1: 212. 1906 | ||
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|name=Senecio fendleri var. subintegra | |name=Senecio fendleri var. subintegra | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio wrightii | |name=Senecio wrightii | ||
|authority=Greenman | |authority=Greenman | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera cynthioides | |hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera cynthioides | ||
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name=Packera cynthioides | name=Packera cynthioides | ||
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|authority=(Greene) W. A. Weber & Á. Löve | |authority=(Greene) W. A. Weber & Á. Löve | ||
|rank=species | |rank=species | ||
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|publication title=Phytologia | |publication title=Phytologia | ||
|publication year=1981 | |publication year=1981 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1298.xml |
|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Packera | |genus=Packera | ||
Latest revision as of 19:59, 5 November 2020
Perennials, 20–40+ cm; rhizomatous (rhizomes horizontal to erect). Stems 1 or 2–3, clustered, densely lanate-tomentose or canescent, tufts of arachnoid tomentum in leaf axils, or glabrescent. Basal leaves (thick, leathery) petiolate; blades narrowly lanceolate or oblanceolate, 25–100+ × 5–20 mm, bases tapering, margins entire, subentire, dentate, or wavy (adaxial faces early glabrescent). Cauline leaves gradually reduced (sessile; lanceolate to oblanceolate, entire or wavy). Heads 10–30+ in open or congested, cymiform arrays. Peduncles 0 (or relatively reduced, then densely tomentose). Calyculi inconspicuous (bractlets red-tipped). Phyllaries (8–)13, green (tips red), 3–6 mm, densely tomentose proximally, glabrate distally. Ray florets (5–)8; corolla laminae 8–10+ mm. Disc florets 35–45+; corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 5–6 mm. 2n = 46.
Phenology: Flowering late Jul–mid Sep.
Habitat: Loose rocky soils, steep slopes, subalpine and pine-juniper forests
Elevation: 2200–2900 m
Discussion
Packera cynthioides blooms later than other Packera species at the same latitudes. It is noted by collectors as usually growing on north- or west-facing slopes in limestone-derived soils. Its cauline leaves are well developed and held at a shallow angle to the stem, giving the plant a more “leafy” aspect than other members of the genus.
Selected References
None.