Horkelia californica var. frondosa

leafy horkelia

Family:Rosaceae

Rarity

CNPS-EB: B-PV

14 current natural populations

Criteria:

N Limit
Small Populations

Observations

Key

Ecology

Flowers May - October

Habitats:

Scrub (Coastal or Interior)

All Horkelia

References

Synonyms

Horkelia californica subsp. frondosa
Horkelia frondosa
Potentilla frondosa

Populations

Key

Location	Pop ID	Last Recorded	Notes
Briones Rgnl Park	21	2018-05-17
Crockett	5	2023-07-01
El Sobrante	8	2023-06-27
Gateway area, EBMUD land	9	2001-03-31
Lafayette Ridge, Briones Rgnl Park	1	2025-06-26
Las Trampas Rgnl Wilderness	20	2023-05-09
Mission Peak Rgnl Park	13	2018-01-27
Mt. Diablo State Park - East side	6	2002-08-24
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	7	2008-12-31
San Francisco Water District land, Sunol	16	2009-12-31
San Pablo Reservoir - EBMUD	22	2025-06-14
Tilden Rgnl Park - other or unknown sites	19	2023-04-29
Vasco Caves Rgnl Park	17	2025-03-28
Wildcat Rgnl Park	18	2009-12-31
Brushy Peak Rgnl Park - LARPD	2	1997-12-31	Historic
Claremont Canyon Rgnl Park	4	1991-07-28	Historic
EBMUD land near Chabot Rgnl Park	3	1992-02-23	Historic
Lily Spring, San Pablo Ridge - EBMUD land	10	1999-12-31	Historic
Mines Road/Arryo Mocho	12	2000-04-12	Historic
Morgan Territory Rgnl Park	11	1999-12-31	Historic
Niles Canyon area	14	1926-05-26	Historic
Pleasanton Ridge Rgnl Park	15	1999-09-19	Historic

The list of populations shows the distinct populations identified by the CNPS-EB Rare and Unusual Plants Committee. The locations in this list are very general. More specific location details can be obtained from the links in the Observations section (for some of these links, a login is required).

Font

Populations in bold type have precise coordinates available for field volunteers and researchers.

Populations in normal type are only known from a description of the location; no precise coordinates are available.

Background

Populations with a white background have been observed in the last 25 years.

Populations with a blue background have not been observed for at least 25 years.

Populations with an orange background have an uncertain location or identification, or are planted.

Columns

Pop ID is a label that identifies the population. Many locations have more than one population of a species, and the population ID is used to distinguish them.