Rumex californicus

willow dock

Family:Polygonaceae

Rarity

CNPS-EB: B-PV

17 current natural populations

Criteria:

Limited/Threatened Habitat

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Rumex
- Rumex californicus
CCH2

Key

Ecology

Flowers May - September

Habitats:

Miscellaneous Wetlands

All Rumex

References

Synonyms

Rumex salicifolius var. denticulatus

Populations

Key

Location	Pop ID	Last Recorded	Notes
Alameda Creek - Sunol Valley section, SFWD	2	2004-06-09
Alameda Shore	22	2023-04-08
Calaveras Reservoir, SFWD	5	2009-06-16
Livermore - other or unknown sites	9	2002-12-31
Mines Road/Arryo Mocho	18	2023-05-19
Mines Road/Arryo Mocho	19	2023-08-03
Mines Road/Arryo Mocho	20	2023-05-19
Mines Road/Arryo Mocho	21	2023-08-03
Ohlone Rgnl Wilderness	7	2006-06-08
Pt. Pinole Rgnl Park	23	2017-07-01
San Antonio Reservoir - SFWD	3	2004-06-09
San Francisco Water District land, Sunol	4	2009-05-26
Sunol Rgnl Wilderness	6	2022-07-01
Sunol Rgnl Wilderness	24	2025-08-04
Sunol Rgnl Wilderness	25	2016-07-22
Sycamore Grove Rgnl Park - LAPRD	15	2025-06-01
Tesla, Corral Hollow	17	2023-05-05
Alameda Creek - Sunol Valley section, SFWD	1	2000-12-31	Historic
Del Valle Regional Park	11	1999-12-31	ID Uncertain
Leona Heights Rgnl Park, or nearby	12	1943-12-31	Historic
Livermore - other or unknown sites	8	1996-05-12	Historic
Livermore - other or unknown sites	10	1943-12-31	Historic
Miller - Knox Rgnl Park	14	2000-09-08	Historic
Mines Road/Arryo Mocho	13	1936-12-31	Historic
Wildcat Rgnl Park	16	1999-07-17	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.