CNPS

CNPS Rare Plant Inventory

Species Details

Phacelia phacelioides

Mt. Diablo phacelia

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Photo of Phacelia phacelioides
©2019 Steve Matson 		Photo of Phacelia phacelioides
©2014 Aaron Schusteff 		Photo of Phacelia phacelioides
©2019 Steve Matson

  Classification

Scientific Name:
Phacelia phacelioides (Benth.) Brand
Common Name:
Mt. Diablo phacelia
Family: Hydrophyllaceae
Element Code: PDHYD0C3Q0
USDA Plants Symbol: PHPH
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G2
State Rank:
 S2
Other Status: BLM_S; SB_CalBG/RSABG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-12-06

  Ecology and Life History

Lifeform: annual herb
Blooming Period: Apr-May
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Elevation:
500 - 1370 meters
1640 - 4495 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details:
Microhabitat:
  • Rocky

  Notes

Notes:
Known from fewer than twenty occurrences. Many occurrences historical; need field surveys. Possibly threatened by foot traffic and trail construction.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 4 25 %
THREAT LIST:
Road/trail construction/maint. 2 12%
Erosion/runoff 1 6%
Foot traffic/trampling 1 6%
Grazing 1 6%
Non-native plant impacts 1 6%

  Occurrence Data from the CNDDB

Total Occurrences: 16
Element Occurrence Ranks:
A B C D X U
1 3 0 1 0 11
Occurrence Status:
Historical >20 Years 15
Recent <=20 Years 1
Presence:
Presumed Extant 16
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Contra Costa (CCA), San Benito (SBT), Santa Clara (SCL), Stanislaus (STA)
Quads: Name (Quad Code)
Clayton (3712188), Copper Mtn. (3712143), Diablo (3712178), Idria (3612046), Isabel Valley (3712135), Lick Observatory (3712136), Lone Tree Creek (3712154), Mt. Boardman (3712144), Mt. Stakes (3712134), Solyo (3712153)
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.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2023. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 27 September 2023].