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Montana Field Guide

Montana Field Guides

Marsh Ragwort - Senecio congestus
Other Names:  Tephroseris palustris

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
Fibrous-rooted annual to short-lived perennial. Stems hollow, erect, 15–80 cm. Herbage villous to sparsely tomentose. Leaves short-petiolate below, mainly cauline at flowering; blades oblanceolate to spatulate, dentate to shallowly lobed, 5–15 cm long, not much reduced but becoming sessile above. Inflorescence corymbiform with 6 to 20 heads, somewhat congested. Heads radiate; involucres 5–10 mm high; phyllaries ca. 21, pale, sometimes pink-tipped. Rays ca. 21; ligules 5–9 mm long. Disk corollas 6–10 mm long. Achenes glabrous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
AK to NL south to BC, AB, MT, SD IA, MI. One collection from Roosevelt County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Slightly brackish seasonal wetland margins and wet meadows.

References
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Citation for data on this website:
Marsh Ragwort — Senecio congestus.  Montana Field Guide.  .  Retrieved on , from