Taxon Report

Horkelia parryi Greene

Parry's horkelia

Print Report


© 2009 Barry Breckling

  Classification
Scientific Name:
 Horkelia parryi Greene
Common Name:
 Parry's horkelia
Family: Rosaceae
Element Code: PDROS0W0C0
USDA Plants Symbol: HOPA2
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: Apr-Sep Apr-Sep
Elevation: 80-1070 (260-3510)
General Habitats: Chaparral, Cismontane woodland
Microhabitat:
Microhabitat Details: Ione formation and other soils

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

Occurrence Data from the CNDDB
Total Occurrences: 44
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 16
   Fair (C) 3
   Poor (D) 1
   None (X) 0
   Unknown (U) 24

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Amador (AMA), Calaveras (CAL), El Dorado (ELD), Mariposa (MPA), Tuolumne (TUO)
Quads: Name (Quad Code)
Buckhorn Peak (3712061), Calaveritas (3812025), Camino (3812066), Carbondale (3812141), Columbia Se (3812013), Feliciana Mtn. (3711958), Garden Valley (3812077), Georgetown (3812087), Ione (3812038), Irish Hill (3812048), Kinsley (3711968), Murphys (3812024), Omo Ranch (3812055), Placerville (3812067), Rail Road Flat (3812035), Slate Mtn. (3812076), Stanislaus (3812023), Tunnel Hill (3812086), Wallace (3812028)

Threat List Data from the CNDDB

Threat List Total: 13
EOs with Threat Listed: Total EOs % of EOs
25 57 %
Road/trail construction/maint. 17 38%
ORV activity 11 25%
Wood cutting or brush clearing 8 18%
Recreational use (non-ORV) 4 9%
Erosion/runoff 3 6%
Improper burning regime 3 6%
Logging 3 6%
Mining 2 4%
Biocides 2 4%
Vandalism/dumping/litter 2 4%
Non-native plant impacts 1 2%
Grazing 1 2%
Other 1 2%

Notes
Potentially threatened by clay mining, road maintenance, and erosion. Possibly threatened by vehicles and non-native plants.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 29 December 2024].