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Rough-head Groundsel - Senecio sphaerocephalus
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Native Species Global Rank :
G4G5
State Rank :
S4
C-value :
6
Agency Status USFWS :
USFS :
BLM :
External Links
General Description
Plants from a stout horizontal rhizome. Stems erect, 25–80 cm. Herbage sparsely arachnoid. Leaves basal and cauline; blades ovate to oblanceolate, 4–15 cm long, entire to minutely dentate, becoming linear-lanceolate and sessile above. Inflorescence corymbiform of 7 to 30 heads. Heads radiate; involucres 5–9 mm high; phyllaries ca. 21, sparsely arachnoid, black-tipped. Rays ca. 13; ligules 5–9 mm long. Disk corollas 5–8 mm long. Achenes 1–3 mm long, sparsely puberulent (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Species Range
Montana Range
Range Descriptions
Native
Range Comments
OR, ID, MT, NV, UT and WY (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).UT (Daggett, Duchesne, Summit, Uintah, and Wasatch counties), OR, MT, ID, WY, CO, NV.
Observations in Montana Natural Heritage Program Database
Number of Observations: 60
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Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus bifarius ,
Bombus flavifrons ,
Bombus frigidus ,
Bombus huntii ,
Bombus melanopygus ,
Bombus mixtus ,
Bombus sylvicola ,
Bombus occidentalis ,
Bombus insularis ,
Bombus suckleyi ,
Bombus flavidus , and
Bombus kirbiellus (Schmitt 1980, Thorp et al. 1983, Mayer et al. 2000, Wilson et al. 2010, Pyke et al. 2012, Koch et al. 2012, Williams et al. 2014).
Stewardship Responsibility
References
Literature Cited AboveLegend: Senecio (Compositae). Evolution 34: 934-943.
Additional ReferencesLegend: Do you know of a citation we're missing?
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