Taxon Report

Packera ganderi (T.M. Barkley & R.M. Beauch.) W.A. Weber & A. Love

Gander's ragwort

Print Report

Taxon Summary

Packera ganderi, commonly known as Gander's ragwort, is a perennial herb in the Asteraceae that is found only in California. It occurs within Chaparral (burned areas, and gabbroic outcrops), growing at elevations from 400 to 1200 meters. Packera ganderi is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Packera ganderi (T.M. Barkley & R.M. Beauch.) W.A. Weber & A. Love
Common Name:	Gander's ragwort
Family:	Asteraceae
Element Code:	PDAST8H1F0
USDA Plants Symbol:	PAGA5
Synonyms/Other Names:	Senecio ganderi T.M. Barkley & R.M. Beauch.

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	400-1200 (1310-3935)
General Habitats:	Chaparral
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	CR
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	5
Good (B)	3
Fair (C)	0
Poor (D)	1
None (X)	1
Unknown (U)	4

Location


California Endemic: True
California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)
Quads: Name (Quad Code)
Alpine (3211677), Barrett Lake (3211666), Dulzura (3211667), El Cajon Mtn. (3211687), Mesa Grande (3311627), Pechanga (3311741), San Vicente Reservoir (3211688), Tecate (3211656)

Threat List Data from the CNDDB


Threat List Total:	10
EOs with Threat Listed:	Total EOs	% of EOs
	10	71 %
Development	4	28%
Foot traffic/trampling	4	28%
Road/trail construction/maint.	4	28%
ORV activity	3	21%
Other	1	7%
Over-collecting/poaching	1	7%
Recreational use (non-ORV)	1	7%
Mining	1	7%
Erosion/runoff	1	7%
Agriculture	1	7%

Notes



Known from fewer than twenty occurrences. Threatened by recreational activities, vehicles and trampling. See Senecio ganderi in The Jepson Manual (1993). See Brittonia 26:106-108 (1974) for original description. See Phytologia 49(1): 44-50 (1981) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 22 November 2025].