Taxon Report

Ivesia sericoleuca (Rydb.) Rydb.

Plumas ivesia

Print Report


© 2003 Steve Matson

Taxon Summary

Ivesia sericoleuca, commonly known as Plumas ivesia, is a perennial herb in the Rosaceae that is found only in California. It occurs within Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, and Vernal pools, growing at elevations from 1310 to 2200 meters. Ivesia sericoleuca is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  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 10 February 2025].