Difference between revisions of "Packera hesperia"
Phytologia 49: 47. 1981.
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|common_names=Western ragwort | |common_names=Western ragwort | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=C | ||
| + | |label=Conservation concern | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Senecio hesperius | |name=Senecio hesperius | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
|publication_title=Pittonia | |publication_title=Pittonia | ||
|publication_place=2: 166. 1891 | |publication_place=2: 166. 1891 | ||
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|name=Senecio auleticus | |name=Senecio auleticus | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera hesperia | |hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera hesperia | ||
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name=Packera hesperia | name=Packera hesperia | ||
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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;Conservation concern |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1314.xml |
|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Packera | |genus=Packera | ||
Latest revision as of 20:00, 5 November 2020
Perennials, 7–15+ cm; fibrous-rooted (caudices relatively slender). Stems 1, glabrous or sparsely tomentose. Basal leaves (and proximal cauline) petiolate; blades ovate, oblanceolate, or spatulate, 10–30 × 5–20 mm, bases tapering, sometimes obtuse, margins entire, subentire, or dentate. Cauline leaves abruptly reduced (sessile, clasping; bractlike, entire). Heads 1–4+ in corymbiform arrays. Peduncles bracteate (bractlets red-tinged), densely lanate-tomentose. Calyculi conspicuous (bractlets narrow, red-tinged). Phyllaries (13–)21, green (tips red or dark red), densely tomentose proximally. Ray florets (8–)13; corolla laminae 6–10+ mm. Disc florets 35–50+; corolla tubes 2.5–3.5 mm, limbs 3–4 mm. Cypselae 1.5–2 mm, glabrous; pappi 5–6 mm. 2n = 46.
Phenology: Flowering mid Apr–mid Jun.
Habitat: Serpentine derived soils, open woodland scrub
Elevation: 500–2500 m
Discussion
Of conservation concern.
Packera hesperia is known only from the Siskiyou Mountains.
Selected References
None.