Taxon Report

Phacelia phacelioides (Benth.) Brand

Mt. Diablo phacelia

Print Report

©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:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-May	Apr-May
Elevation:	500-1370 (1640-4495)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Rocky
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_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	40
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	4
Fair (C)	0
Poor (D)	1
None (X)	0
Unknown (U)	33

Location


California Endemic: True
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Fresno (FRE), San Benito (SBT), Santa Clara (SCL), Stanislaus (STA)
Quads: Name (Quad Code)
Clayton (3712188), Copper Mtn. (3712143), Diablo (3712178), Eylar Mtn. (3712145), Idria (3612046), Isabel Valley (3712135), Lick Observatory (3712136), Lone Tree Creek (3712154), Mississippi Creek (3712124), Mt. Boardman (3712144), Mt. Stakes (3712134), San Benito Mtn. (3612036), Santa Rita Peak (3612035), Solyo (3712153)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	3	8 %
Road/trail construction/maint.	2	5%
Erosion/runoff	1	2%
Foot traffic/trampling	1	2%
Grazing	1	2%
Non-native plant impacts	1	2%

Notes



Known from fewer than twenty occurrences. Many occurrences historical; need field surveys. Possibly threatened by foot traffic and trail construction.
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 27 December 2024].