Hibiscus lasiocarpos var. occidentalis

rose-mallow

Family:Malvaceae

Rarity

CNPS-EB: *A2
State CNPS: 1B.2
Global Rank: G5T3
CNDDB Rank: S3

10 current natural populations

Criteria:

Limited/Threatened Habitat
Narrow Range in ALA & CCA

Observations

Key

Ecology

Habitats:

Freshwater Marsh

References

Synonyms

Hibiscus californicus
Hibiscus lasiocarpos var. californicus
Hibiscus moscheutos var. occidentalis

Populations

Key

Location	Pop ID	Last Recorded	Notes
Bethany Reservoir - S of Byron	15	2023-09-08
Clifton Court Forebay - E of Byron	2	2009-05-11
Clifton Court Forebay - E of Byron	12	2009-08-31
Clifton Court Forebay - E of Byron	13	2009-09-02
Holland Tract	5	2009-07-21
Holland Tract	14	2009-07-21
Old River	8	2003-08-07
Rhode Island	9	2009-07-20
Rock Slough	6	2009-07-21
Webb Tract	11	2010-06-28
Bethel Island	1	1964-09-05	Historic
Discovery Bay	7	1980-12-31	Historic
Dutch Slough	3	1992-12-31	Historic
Frank's Tract	4	1992-12-31	Historic
Sand Mound Slough	10	1992-12-31	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.