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Montana Field Guide

Montana Field Guides

Few-flowered Butterweed - Senecio pauciflorus
Other Names:  Packera pauciflora

Status Under Review

Global Rank: G5
State Rank: SU

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

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General Description
Few-flowered Butterweed is a glabrous, perennial herb with stems that are 15-40 cm high and arising from a simple or branched rootcrown with fibrous roots. The basal leaves are 3-10 cm long and have long petioles and thick, spade-shaped blades with coarsely toothed margins. The alternate stem leaves, some with a pair of basal lobes, become smaller and sessile upward. Usually, 2-6 erect flower heads are borne in a crowded, terminal inflorescence. Each flower head has a single series of reddish-purple, narrow, pointed involucral bracts that are 6-8 mm long. Disk flowers are orange to reddish. Rays are inconspicuous or lacking. The achene has a pappus at its summit.

Phenology
Flowering in June.

Diagnostic Characteristics
Senecio is a large genus, and a technical manual should be consulted for positive identification. Senecio debilis and S. indecorus have more deeply lobed lower leaves and are generally found at lower elevations.

Species Range
Unknown/Undetermined
 


Range Comments
AK and YK east to QC and NL, south to CA and WY (Packer, 2000, in Fl. Alberta).

Summary of Observations Submitted for Montana
Number of Observations: 1

(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 meadows and cliffs in the montane zone.

References
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Citation for data on this website:
Few-flowered Butterweed — Senecio pauciflorus.  Montana Field Guide.  .  Retrieved on , from