Taxon Report

Ivesia sericoleuca (Rydb.) Rydb.

Plumas ivesia

Print Report

Classification


Scientific Name:	Ivesia sericoleuca (Rydb.) Rydb.
Common Name:	Plumas ivesia
Family:	Rosaceae
Element Code:	PDROS0X0K0
USDA Plants Symbol:	IVSE
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Oct	May-Oct
Elevation:	1310-2200 (4300-7220)
General Habitats:	Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Vernal pools
Microhabitat:	Vernally Mesic, Volcanic (usually)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_UCSC; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	80
Element Occurrence Ranks:
Excellent (A)	9
Good (B)	30
Fair (C)	11
Poor (D)	2
None (X)	1
Unknown (U)	27

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lassen (LAS), Nevada (NEV), Placer (PLA), Plumas (PLU), Sierra (SIE)
Quads: Name (Quad Code)
Blairsden (3912075), Boca (3912041), Calpine (3912064), Crocker Mtn. (3912084), Dog Valley (3912051), Ferris Creek (4012013), Grizzly Valley (3912085), Hobart Mills (3912042), Independence Lake (3912043), Janesville (4012035), Martis Peak (3912031), McKesick Peak (4012012), Portola (3912074), Reconnaissance Peak (3912073), Sardine Peak (3912052), Sattley (3912054), Sierraville (3912053), Squaw Valley Peak (4012014), Truckee (3912032)

Threat List Data from the CNDDB


Threat List Total:	17
EOs with Threat Listed:	Total EOs	% of EOs
	59	74 %
Grazing	40	50%
Road/trail construction/maint.	22	27%
ORV activity	20	25%
Recreational use (non-ORV)	9	11%
Development	9	11%
Other	8	10%
Erosion/runoff	6	7%
Foot traffic/trampling	6	7%
Non-native plant impacts	5	6%
Surface water diversion	3	3%
Logging	3	3%
Dam/Inundation	2	2%
Vandalism/dumping/litter	2	2%
Agriculture	2	2%
Altered flood/tidal/hydrologic regime	1	1%
Disking	1	1%
Landfill	1	1%

Notes



Threatened by development, grazing, and vehicles. Potentially threatened by recreational activities, timber harvest, fire suppression, road construction and maintenance, hydrological alterations, and erosion. Interim management guide prepared by the USFS in 1992.
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 9 January 2025].