Blepharizonia laxa

big tarplant

Family:Asteraceae

Rarity

CNPS-EB: B

9 current natural populations

Criteria:

N Limit
W Limit
Small Populations

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Blepharizonia
- Blepharizonia laxa
CCH2

Key

Ecology

Flowers July - November

Habitats:

Chaparral
Grassland (Annual or Perennial)
Scrub (Coastal or Interior)
Woodland

All Blepharizonia

B. laxa
B. plumosa (*A2)

References

Synonyms

Blepharizonia plumosa subsp. viscida

Populations

Key

Location	Pop ID	Last Recorded	Notes
Black Diamond - Markley Canyon	10	2020-09-19
Black Diamond Rgnl Preserve	3	2002-12-31
Black Diamond Rgnl Preserve	4	2025-09-06
Corral Hollow Area	6	2008-08-23
Corral Hollow Area	8	2002-12-31
Del Valle Regional Park	9	2017-09-16
Lawrence Livermore Lab, Site 300, Corral Hollow	12	2021-12-31
Mt. Diablo State Park - South side	11	2020-09-26
Tesla, Corral Hollow	7	2016-09-12
Contra Loma Rgnl Park	2	2000-12-31	Historic
Horse Valley - W of Brentwood, S of Antioch	1	1883-12-31	Historic
Pittsburg Hills	5	1937-12-31	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.