Difference between revisions of "Arnica griscomii"
Rhodora 26: 105, plate 143, fig. 7. 1924.
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|name=Arnica louiseana subsp. griscomii | |name=Arnica louiseana subsp. griscomii | ||
|authority=(Fernald) Maguire | |authority=(Fernald) Maguire | ||
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|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Arnica;Arnica griscomii | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Arnica;Arnica griscomii | ||
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name=Arnica griscomii | name=Arnica griscomii | ||
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|authority=Fernald | |authority=Fernald | ||
|rank=species | |rank=species | ||
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|publication year=1924 | |publication year=1924 | ||
|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_925.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | ||
Revision as of 19:40, 16 December 2019
Plants 5–40 cm. Stems usually simple, rarely branched. Leaves 1–4 pairs, mostly cauline; petiolate; blades elliptic, lanceolate, oblanceolate, ovate, or spatulate, 1.2–10 × 0.5–3.5 cm, margins usually denticulate to dentate, rarely entire, apices acute to obtuse or abruptly pointed, faces usually glabrous or sparingly hispidulous-puberulent, rarely stipitate-glandular. Heads usually 1, sometimes 2–3 (erect or nodding). Involucres hemispheric to campanulate-turbinate (bases sparsely to densely pilose, hairs white or yellow). Phyllaries 9–20, lanceolate to oblanceolate, not stipitate-glandular. Ray florets 6–17; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae brown, 2.5–6 mm, abaxially glabrous, adaxially sparsely hirsute or glabrous throughout, rarely glandular; pappi white, bristles barbellate.
Distribution
North America, Asia (e Russia).
Discussion
Subspecies 2 (2 in the flora).
Selected References
None.
Key
| 1 | Involucre bases sparsely to moderately white-pilose; Newfoundland, Québec | Arnica griscomii subsp. griscomii |
| 1 | Involucre bases densely yellow-pilose; w North-west Territories to n British Columbia, Alaska | Arnica griscomii subsp. frigida |