Symphyotrichum lanceolatum var. hesperium

marsh aster

Family:Asteraceae

Rarity

CNPS-EB: A2

6 current natural populations

Criteria:

Disjunct

Observations

Key

Ecology

Flowers July - August

Habitats:

Miscellaneous
Miscellaneous Wetlands
Riparian

All Symphyotrichum

S. frondosum (A1x)
S. lanceolatum var. hesperium
S. lentum (*A2)
S. subulatum var. parviflorum (B)

References

Synonyms

Aster hesperius
Aster lanceolatus subsp. hesperius
Symphyotrichum lanceolatum subsp. hesperium

Populations

Key

Location	Pop ID	Last Recorded	Notes
Mt. Diablo State Park - South side	3	2009-08-10
Mt. Diablo State Park - South side	4	2022-12-15
Mt. Diablo State Park - West side	10	2023-08-31
Redwood Rgnl Park	6	2009-09-04
Rodeo Shoreline	5	2006-11-16
San Leandro Reservoir - EBMUD	13	2019-11-23
Alvarado	1	1897-09-09	Historic
Chabot Rgnl Park	2	1991-09-07	Historic
San Pablo Reservoir - EBMUD	12	1991-09-28	Historic
Sobrante Ridge Rgnl Park	11	2000-09-02	Historic
Sunol Rgnl Wilderness	9	1999-11-26	Historic
Tilden Rgnl Park - other or unknown sites	7	1996-09-11	Historic
Vollmer Peak Area	8	1996-09-11	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.