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Montana Field Guide

Montana Field Guides

Northwestern Groundsel - Senecio conterminus
Other Names:  Senecio resedifolius, Packera cymbalaria, Packera resedifolia, Packera contermina


Global Rank: G3G4
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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General Description
Fibrous-rooted from a short rhizome. Stems ascending to erect, 4–10 cm. Herbage glabrate to sparsely arachnoid especially at basal leaf bases. Leaves thick; basal blades suborbicular to obovate, dentate, 5–20 mm long; cauline, sessile, lanceolate to oblanceolate, entire to pinnately lobed. Inflorescence 1 (2) heads. Heads radiate; involucres 9–15 mm high; phyllaries 21, glabrous, purplish. Rays 10 to 13; ligules 7–11 mm long. Disk corollas 5–8 mm long. Achenes 2–4 mm long, glabrous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Lesica (2012) treats this species as Senecio cymbalaria and indicates that Senecio conterminus should be considered a synonym of S. cymbalaria. Others treat the species as Packera cymbalaria (Pursh) W.A. Weber & A. Love. Some sources, however, accept both Packera contermina and P. cymbalaria as distinct species .

Species Range
Present
 


Range Comments
Amphi-Beringian arctic alpine (Kamckatka Peninsula, Siberia, Alaska, Aleutian islands), from Mackenzie Mts. (NWT) over Alaska and N. central Asia to Ural Mts.

Lesica (2012) indicates the range in North America as being from AK to NL south to WA, ID and MT.


Summary of Observations Submitted for Montana
Number of Observations: 9

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Moist to dry, stony soil of fellfields, moraine, rock outcrops; alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Northwestern Groundsel — Senecio conterminus.  Montana Field Guide.  .  Retrieved on , from