Equisetum laevigatum

smooth scouring rush

Family:Equisetaceae

Rarity

CNPS-EB: A2

5 current natural populations

Criteria:

Limited/Threatened Habitat

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Equisetum
- Equisetum laevigatum
CCH2

Key

Ecology

Habitats:

Miscellaneous Wetlands
Riparian

References

Synonyms

Equisetum fontinale
Equisetum funstonii
Equisetum kansanum

Populations

Key

Location	Pop ID	Last Recorded	Notes
Morgan Territory Rgnl Park	14	2022-03-22
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	6	2011-06-06
Richmond Hills	17	2024-10-09
Sibley Rgnl Park	15	2023-04-14
Sunol Rgnl Wilderness	18	2025-08-27
Alameda Creek - Sunol Valley section, SFWD	1	2000-12-31	Historic
Antioch Dunes	16	1997-04-27	Historic
Berkeley Hills	2	1902-12-31	Historic
Briones Rgnl Park	3	1999-12-31	Historic
Carquinez Strait Rgnl Park	4	1998-12-31	Historic
Del Valle Regional Park	8	1997-12-31	Historic
Leona Heights Rgnl Park, or nearby	9	1998-06-01	Historic
Mt. Diablo State Park - South side	5	1931-10-31	Historic
Mt. Diablo State Park - West side	7	1997-12-31	Historic
Norris Canyon	10	1991-12-31	Historic
Sycamore Grove Rgnl Park - LAPRD	12	1999-12-31	Historic
Tilden Rgnl Park - other or unknown sites	13	1955-07-17	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.