Difference between revisions of "Oönopsis multicaulis"
Pittonia 3: 45. 1896.
Common names: Yellow-rayed or branched goldenweed
Basionym: Stenotus multicaulis Nuttall Trans. Amer. Philos. Soc., n. s. 7: 335. 1840
Synonyms: Haplopappus multicaulis (Nuttall) A. Gray Oönopsis argillacea A. Nelson
Treatment appears in FNA Volume 20. Treatment on page 411.
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|name=Stenotus multicaulis | |name=Stenotus multicaulis | ||
|authority=Nuttall | |authority=Nuttall | ||
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|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Haplopappus multicaulis | |name=Haplopappus multicaulis | ||
|authority=(Nuttall) A. Gray | |authority=(Nuttall) A. Gray | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Oönopsis argillacea | |name=Oönopsis argillacea | ||
|authority=A. Nelson | |authority=A. Nelson | ||
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|hierarchy=Asteraceae;Asteraceae tribe Astereae;Oönopsis;Oönopsis multicaulis | |hierarchy=Asteraceae;Asteraceae tribe Astereae;Oönopsis;Oönopsis multicaulis | ||
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Oönopsis | |genus=Oönopsis | ||
Latest revision as of 20:06, 5 November 2020
Plants 2–11(–14) cm. Stems sparsely villosulous, glabrescent at maturity. Leaf blades linear to linear-oblanceolate, 7–85 × 0.8–4.2(–5) mm, cauline bases not auriculate or clasping, distalmost abruptly reduced in size. Heads not immediately subtended by leafy bracts. Involucres 6–10 mm. Phyllary apices abruptly acute to obtuse, apiculate to cuspidate. Ray florets 5–11. Disc florets 12–25. Cypselae 2.8–4 mm, faces tomentose. 2n = 8.
Phenology: Flowering Jun–Jul(–Aug).
Habitat: Barren selenium and/or alkaline hills and flats, loose shaley, clay-shale, and sandy-clay soil, pastures, eroded clay pans in mid-grass prairie with Artemisia, sometimes with Atriplex
Elevation: 1100–1900 m
Distribution
Mont., Nebr., S.Dak., Wyo.
Discussion
Oönopsis multicaulis grows in Carter County in Montana, Dawes and Sioux counties in Nebraska, Butte and Fall River counties in South Dakota, and Campbell, Carbon, Converse, Crook, Fremont, Johnson, Natrona, Niobrara, Platte, and Weston counties in Wyoming.
Selected References
None.
Lower Taxa
None.
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