Extriplex joaquinana

San Joaquin spearscale, San Joaquin saltbush

Family:Chenopodiaceae

Rarity

CNPS-EB: *A2
State CNPS: 1B.2
Global Rank: G2
CNDDB Rank: S2

23 current natural populations

Criteria:

Limited/Threatened Habitat

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Extriplex
- Extriplex joaquinana
CCH2

Key

Ecology

Flowers April - September

Habitats:

Alkali Areas
Grassland (Annual or Perennial)
Miscellaneous Wetlands

All Extriplex

E. californica (A1x)
E. joaquinana

References

Synonyms

Atriplex joaquinana
Atriplex patula subsp. spicata
Atriplex spicata var. lagunita

Populations

Key

Location	Pop ID	Last Recorded	Notes
Bethany Reservoir - S of Byron	19	2009-08-28
Brushy Peak - EBRPD	5	2021-09-01
Byron - other or unknown sites	20	2009-06-25
Discovery Bay	22	2008-04-23
Discovery Bay	23	2008-09-23
Discovery Bay	24	2008-09-23
Dublin, E of 680, N of 580	9	2006-04-30
Garaventa Wetlands Preserve	30	2023-04-15
Livermore - other or unknown sites	7	2011-06-20
Livermore Valley	6	2008-08-27
Los Vaqueros Watershed	16	2003-04-27
Los Vaqueros Watershed	17	2025-03-16
Los Vaqueros Watershed	21	2008-04-25
Los Vaqueros Watershed	29	2022-02-25
Marsh Creek Reservoir	25	2008-04-25
Martinez, East of Benecia Bridge	2	2011-06-23
San Ramon, East of 680	8	2012-08-01
Sand Creek	3	2002-12-31
Springtown Wetlands Preserve	11	2025-06-01
Vasco Hills	13	2008-04-24
Vasco Hills	14	2008-04-22
Vasco Hills	15	2010-08-11
Warm Springs, Fremont	28	2011-07-07
Altamont Pass	4	1862-05-31	Historic
Antioch - other or unknown sites	1	1934-04-08	Historic
Byron Hot Springs area	18	1996-12-31	Historic
Marsh Creek - other or unknown sites	26	1922-12-31	Historic
Oakland Shoreline	27	1929-06-30	Historic
San Ramon, East of 680	10	1999-12-31	Historic
Vasco Road, South - ALA Co	12	1982-07-21	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.