Few-flowered Butterweed - Senecio pauciflorus
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.
Flowering in June.
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.
AK and YK east to QC and NL, south to CA and WY (Packer, 2000, in Fl. Alberta).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Moist meadows and cliffs in the montane zone.
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.