Difference between revisions of "Arnica discoidea"
Pl. Hartw., 319. 1849.
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|common_names=Rayless arnica | |common_names=Rayless arnica | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
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|basionyms= | |basionyms= | ||
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|publication title=Pl. Hartw., | |publication title=Pl. Hartw., | ||
|publication year=1849 | |publication year=1849 | ||
| − | |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/V21_942.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | ||
Latest revision as of 20:15, 5 November 2020
Plants 15–60 cm. Stems mostly simple or distally branched. Leaves 3–7 pairs, sometimes crowded at stem bases (basal leaves often persistent on sterile rosettes); petiolate (petioles narrow, 1.5–8 cm, often broadly winged on distal reduced leaves); blades usually ovate to broadly lanceolate, seldom subcordate, 2–12 × 1–7 cm, margins usually serrate to coarsely dentate or crenate, rarely subentire, faces glabrate to pilose, stipitate-glandular. Heads 3–10(–30; erect). Involucres turbinate-campanulate. Phyllaries 8–15, ovate-lanceolate to narrowly lanceolate. Ray florets usually 0 (corollas of peripheral florets rarely dilated, resembling rays). Disc florets 20–50; corollas yellow; anthers yellow. Cypselae dark gray, 6–8 mm, hirsute (hairs duplex) and stipitate-glandular; pappi white, bristles usually barbellate, sometimes subplumose. 2n = 38, 57, 76.
Phenology: Flowering May–Jul.
Habitat: Chaparral, oak and pine forests
Elevation: 100–1500 m
Distribution
Calif., Nev., Oreg., Wash.
Discussion
Selected References
None.