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Montana Field Guide

Montana Field Guides

Arrow-leaf Groundsel - Senecio triangularis


Global Rank: G5
State Rank: S5

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

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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
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 147

(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
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Citation for data on this website:
Arrow-leaf Groundsel — Senecio triangularis.  Montana Field Guide.  .  Retrieved on , from