Potentilla basaltica

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Scientific Name: Potentilla basaltica Tiehm & B. Ertter
Common Name: Black Rock potentilla
Family:	Rosaceae
Element Code:	PDROS1B270
USDA Plants Symbol:	POBA6
Synonyms/Other Names:

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G1
State Rank:	S1
Other Status:	BLM_S; SB_UCSC; USFS_S
CRPR Changes: changed from 1B.2 to 1B.3 on 2012-02-24 changed from 1B.3 to 1B.2 on 2012-02-24
Add Date:	1994-01-01
Date Edited:	2022-12-06

Lifeform: perennial herb

Blooming Period: May-Jun(Jul)

Elevation:
1360 - 1555 meters
4460 - 5100 feet

General Habitats:

Microhabitat Details:

Microhabitat:

Notes: Known in CA from only two occurrences in Ash Valley, and in NV from one occurrence, where threatened. Threatened by trampling and vehicles. Possibly threatened by grazing and road maintenance. Not in The Jepson Manual. See Brittonia 36(3):228-231 (1984) for original description.
Threats:
Taxonomy:

THREAT LIST:
Threat List Total:	4
	Total EOs	% of EOs
EOs with Threat Listed:	2	100 %
Foot traffic/trampling	1	50%
Grazing	1	50%
Other	1	50%
Road/trail construction/maint.	1	50%

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	2

California Endemic:

California Island:

States: Name (Code)
California (CA), Nevada (NV)

California Counties and Islands: Name (Code)
Lassen (LAS)

Quads: Name (Quad Code)
Ash Valley (4112016)

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

Presumed Extant

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CNPS Rare Plant Inventory