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Montana Field Guides

Arrow-leaf Groundsel - Senecio triangularis

Native Species

Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 5

External Links






 
General Description
Plants from a branched caudex. Stems erect, 10–100 cm. Herbage glabrate. Leaves cauline, short-petiolate, only gradually reduced upward; blades lanceolate to deltoid, trunctae or cordate, 2–15 cm long, serrate. Inflorescence corymbiform with 1 to 30 heads. Heads radiate; involucres 7–10 mm high; phyllaries ca. 13, glabrous. Rays ca. 8; ligules 5–12 mm long. Disk corollas 5–9 mm long. Achenes 3–4 mm long, glabrous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range

Year-round
 


Range Comments
AK to NT south to CA, AZ and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1627

(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 soil of forests, meadows, thickets, avalanche slopes, often along streams; montane, subalpine, rarely alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Hollenbeck, R.R. 1974. Growth rates and movements within a population of Rana pretiosa pretiosa Baird and Girard in south central Montana. Ph.D. Dissertation. Bozeman, Montana: Montana State University. 66 p.
    • Joslin, G.J. 1975. Behavior and environmental selection by Elk (Cervus canadensis nelsoni) during surrmer and fall in the First and Second Yellow Mule drainages, Madison County, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University, Bozeman. 65 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Martin, S.A. 1985. Ecology of the Rock Creek bighorn sheep herd, Beartooth Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 152 p.
    • Peck, S.V. 1972. The ecology of the Rocky Mountain goat in the Spanish Peaks area of southwestern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 54 p.
    • Picton, H.D. 1959. Use of vegetative types, migration, and hunter harvest of the Sun River elk herd, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 39 p.
    • Reinhart, D.P. 1990. Grizzly bear habitat use on cutthroat trout spawning streams in tributaries of Yellowstone Lake. M.Sc. Thesis. Bozeman, MT: Montana State University. 128 p.
    • Stoecker, R.E. 1967. A population study of five species of small rodents in the Bridger Mountains of Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 32 p.
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Citation for data on this website:
Arrow-leaf Groundsel — Senecio triangularis.  Montana Field Guide.  .  Retrieved on , from