Cyperus niger

black sedge

Family:Cyperaceae

Rarity

CNPS-EB: A2

6 current natural populations

Criteria:

Narrow Range in ALA & CCA

Observations

Key

Ecology

Flowers July - November

Habitats:

Miscellaneous
Miscellaneous Wetlands

All Cyperus

References

Jepson eFlora
Calflora
iNaturalist (Cyperus melanostachyus)

Synonyms

Cyperus diandrus var. castaneus
Cyperus melanostachyus
Cyperus niger var. capitatus
Cyperus niger var. castaneus

Populations

Key

Location	Pop ID	Last Recorded	Notes
Antioch Dunes	1	2001-08-04
Diablo Foothills Rgnl Park	2	2000-07-16
Mt. Diablo State Park - South side	11	2022-10-15
Mt. Diablo State Park - West side	10	2022-05-14
Mt. Diablo State Park - West side	12	2021-10-03
Mt. Diablo State Park - West side	13	2024-02-16
Don Castro Reservoir	8	2001-06-11	ID Uncertain
Los Vaqueros Watershed	7	1988-12-31	Historic
Mt. Diablo State Park - South side	3	1996-10-25	Historic
Mt. Diablo State Park - West side	4	1952-10-02	Historic
Mt. Diablo State Park - West side	5	1930-10-04	Historic
Mt. Diablo State Park - West side	6	1932-11-11	Historic
Niles Canyon area	9	2004-07-24	ID Uncertain

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.