Difference between revisions of "Arnica venosa"
Univ. Calif. Publ. Bot. 6: 174. 1915.
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|common_names=Shasta County arnica | |common_names=Shasta County arnica | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
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name=Arnica venosa | name=Arnica venosa | ||
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|authority=H. M. Hall | |authority=H. M. Hall | ||
|rank=species | |rank=species | ||
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|publication title=Univ. Calif. Publ. Bot. | |publication title=Univ. Calif. Publ. Bot. | ||
|publication year=1915 | |publication year=1915 | ||
| − | |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_944.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 21:15, 5 November 2020
Plants 20–60 cm. Stems simple or branched (prominently ribbed; caudices woody). Leaves 6–10 pairs, cauline (basal leaves withered by flowering; proximal cauline scalelike, middle leaves largest, distal reduced, bractlike) usually broadly sessile, rarely broadly petiolate; blades (3- or 5-nerved, strongly reticulate-veined) ovate-elliptic to broadly lanceolate, 3–7 × 1.5–4 cm (firm), margins irregularly and coarsely serrate, apices acute to obtuse, faces: abaxial pilose, stipitate-glandular (especially on veins), adaxial glabrate to stipitate-glandular. Heads 1. Involucres turbinate-campanulate. Phyllaries 8–19, ovate to broadly lanceolate. Ray florets 0. Disc florets 30–60; corollas yellow; anthers yellow. Cypselae dark gray, 6–8 mm, densely hirsute (hairs duplex); pappi white, bristles barbellate. 2n = 38.
Phenology: Flowering May–Jun.
Habitat: Open, often disturbed, oak-pine forests
Elevation: 400–1400 m
Discussion
Arnica venosa is known only from Shasta and Trinity counties.
Selected References
None.