Helenium bigelovii

Bigelow's sneezeweed

Family:Asteraceae

Rarity

CNPS-EB: A2

12 current natural populations

Criteria:

Limited/Threatened Habitat
Narrow Range in ALA & CCA
Small Populations

Observations

Key

Ecology

Flowers July - August

Habitats:

Brackish Marsh
Freshwater Marsh

References

Synonyms

Heleniastrum bigelovii
Heleniastrum occidentale
Heleniastrum rivulare
Helenium rivulare

Populations

Key

Location	Pop ID	Last Recorded	Notes
Antioch Dunes	1	2023-06-21
Antioch Dunes	11	2023-06-21
Antioch Shoreline	2	2022-06-18
Big Break, Antioch	8	2019-11-03
Browns Island	3	2017-10-01
Concord Naval Weapons Station	4	2024-10-17
Corteva Wetlands	5	2021-08-01
Corteva Wetlands	13	2022-08-28
Dutch Slough	9	2021-06-25
Dutch Slough	10	2021-05-28
Pittsburg Shore	12	2022-06-02
Winter Island	14	2021-07-07
Clifton Court Forebay - E of Byron	7	1990-12-31	Historic
Martinez shoreline - out of park or specific site unknown	6	1900-06-07	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.