Species Details

Arctostaphylos myrtifolia

Ione manzanita

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Photo of Arctostaphylos myrtifolia
© 2006 Steve Matson
Photo of Arctostaphylos myrtifolia
© 2006 Steve Matson
Photo of Arctostaphylos myrtifolia
© 2019 Cristian Singer
Scientific Name:
Arctostaphylos myrtifolia Parry
Common Name:
Ione manzanita
Family: Ericaceae
Element Code: PDERI04240
USDA Plants Symbol: ARMY
Synonyms/Other Names:
Lifeform: perennial evergreen shrub
Blooming Period: Nov-Mar
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Elevation:
60 - 580 meters
195 - 1905 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details: Ione soil
Microhabitat:
  • Acidic
  • Clay (sometimes)
  • Sandy (sometimes)
Notes:
Protected in part at Ione Manzanita ACEC (BLM) and Apricum Hill ER (CDFW), both in AMA Co. 
Threats:

Threatened by erosion, mining, development, and fungal infection. 

Taxonomy:

See Pittonia 1:34 (1887) for original description, Ecology 45(4):792-808 (1964) for ecological discussion, and Changing Seasons 1(4):4-19 (1982) for species account.

Threat List Total: 8
Total EOs % of EOs
EOs with Threat Listed: 7 64 %
THREAT LIST:
Mining 6 54%
Development 4 36%
Road/trail construction/maint. 4 36%
Disease 3 27%
ORV activity 3 27%
Total Occurrences: 11
Element Occurrence Ranks:
A B C D X U
1 5 0 0 0 5
Occurrence Status:
Historical >20 Years 5
Recent <=20 Years 6
Presence:
Presumed Extant 11
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Amador (AMA), Calaveras (CAL)
Quads: Name (Quad Code)
Carbondale (3812141), Ione (3812038), Irish Hill (3812048), Mokelumne Hill (3812036), San Andreas (3812026), Valley Springs (3812027), Wallace (3812028)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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