Taxon Report

Arctostaphylos manzanita Parry ssp. elegans (Jeps.) Wells

Konocti manzanita

Print Report


©2018 Dean Wm. Taylor

  Classification
Scientific Name:
 Arctostaphylos manzanita Parry ssp. elegans (Jeps.) Wells
Common Name:
 Konocti manzanita
Family: Ericaceae
Element Code: PDERI04271
USDA Plants Symbol: ARMAE
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial evergreen shrub
Blooming Period: (Jan)Mar-May(Jul) (Jan)Mar-May(Jul)
Elevation: 395-1615 (1295-5300)
General Habitats: Chaparral, Cismontane woodland, Lower montane coniferous forest
Microhabitat: Volcanic
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.3
Global Rank: G5T3
State Rank:
 S3
State List: None
Fed List: None
Other Status: BLM_S; SB_UCSC
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 69
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 7
   Fair (C) 2
   Poor (D) 1
   None (X) 0
   Unknown (U) 58

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Humboldt (HUM), Lake (LAK), Mendocino (MEN), Napa (NAP), Shasta (SHA), Sonoma (SON), Tehama (TEH), Trinity (TRI)
Quads: Name (Quad Code)
Alder Springs (3912266), Asti (3812278), Bartlett Mtn. (3912227), Bartlett Springs (3912226), Chrome (3912265), Clearlake Highlands (3812286), Clearlake Oaks (3912216), Cloverdale (3812371), Covelo East (3912372), Covelo West (3912373), Crockett Peak (3912247), Detert Reservoir (3812265), Dinsmore (4012345), Felkner Hill (3912256), Fouts Springs (3912236), Gilmore Peak (3912235), Hall Ridge (3912276), Highland Springs (3812288), Kelseyville (3812287), Lake Pillsbury (3912248), Lakeport (3912218), Lucerne (3912217), Mount St. Helena (3812266), Newville (3912275), Pony Buck Peak (4012331), Potato Hill (3912237), Riley Ridge (3912286), Smoky Creek (4012332), St. John Mtn. (3912246), Tan Oak Park (3912375), The Geysers (3812277), Whispering Pines (3812276), Zenia (4012324)

Threat List Data from the CNDDB

Threat List Total: 6
EOs with Threat Listed: Total EOs % of EOs
10 14 %
Development 7 10%
Agriculture 5 7%
Road/trail construction/maint. 5 7%
Erosion/runoff 1 1%
Improper burning regime 1 1%
Mining 1 1%

Notes
Threats:
Possibly threatened by development, geothermal energy development, conversion to vineyards, vehicles, and road widening. 
Taxonomy:

Selected References

Erythea 1:15 (1893)
Madroño 19(6):201 (1968)
Arctostaphylos manzanita ssp. elegans profile for potential Species of Conservation Concern evaluation (2021)
American Journal of Botany 27(3):186-190
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 January 2025].