Taxon Report

Senecio hydrophiloides Rydb.

sweet marsh ragwort

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Taxon Summary

Senecio hydrophiloides, commonly known as sweet marsh ragwort, is a perennial herb in the Asteraceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, and Meadows and seeps, growing at elevations from 0 to 2800 meters. Senecio hydrophiloides is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Senecio hydrophiloides Rydb.
Common Name:	sweet marsh ragwort
Family:	Asteraceae
Element Code:	PDAST8H400
USDA Plants Symbol:	SEHY
Synonyms/Other Names:	Senecio foetidus Howell

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Aug	May-Aug
Elevation:	0-2800 (0-9185)
General Habitats:	Lower montane coniferous forest, Meadows and seeps
Microhabitat:	Mesic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G5
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: False
California Counties and Islands: Name (Code)
Lassen (LAS), Mono (MNO), Plumas (PLU), Sacramento (SAC)
Quads: Name (Quad Code)
Antelope Lake (4012025), Antioch North (3812117), Babcock Peak (4012015), Bullard Lake (4012078), Champs Flat (4012068), Corders Reservoir (4012172), Crocker Mtn. (3912084), Gallatin Peak (4012056), Glass Mountain (3711876), Greenville (4012028), Grizzly Valley (3912085), Harvey Mtn. (4012161), Janesville (4012035), June Lake (3711971), Roop Mountain (4012047), Sheepshead (4012077), Shinn Mtn. (4012062), Spalding Tract (4012067), Westwood East (4012038)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



Does plant occur in BUT Co.?
Threats:
Threatened by grazing and hydrological alterations.
Taxonomy:
Includes S. foetidus.

Selected References

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].