Calochortus umbellatus

Rarity

CNPS-EB: *A2
State CNPS: 4.2
Global Rank: G3?
CNDDB Rank: S3?

39 current natural populations

Criteria:

Small Geographical Range

Observations

Key

Ecology

Flowers March - May

Habitats:

Chaparral
Scrub (Coastal or Interior)
Woodland

All Calochortus

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
EBMUD land near Chabot Rgnl Park	50	2021-04-03
EBMUD land near Chabot Rgnl Park	58	2021-04-18
EBMUD land near Wildcat Rgnl Park	39	2009-04-10
EBMUD land on San Pablo Ridge	33	2000-12-31
El Cerrito Hills	30	2024-05-01
Gateway area, EBMUD land	36	2018-04-19
Joaquin Miller Park, Oakland	1	2009-05-19
Joaquin Miller Park, Oakland	2	2024-03-30
Joaquin Miller Park, Oakland	3	2005-12-31
Kensington	31	2020-04-07
Knowland Park, Oakland	19	2010-05-06
Lake Temescal Rgnl Park	24	2016-05-10
Las Trampas Rgnl Wilderness	16	2023-05-29
Las Trampas Rgnl Wilderness	17	2002-04-24
Las Trampas Rgnl Wilderness	61	2024-05-05
Leona Heights Rgnl Park, or nearby	14	2024-04-14
Leona Heights Rgnl Park, or nearby	60	2023-04-29
Mt. Diablo State Park - South side	44	2024-06-01
Mt. Diablo State Park - South side	45	2011-06-19
Oakland Hills - North	20	2004-05-17
Redwood Rgnl Park	4	2023-05-03
Redwood Rgnl Park	6	2024-03-27
Redwood Rgnl Park	7	2022-04-19
Redwood Rgnl Park	49	2022-03-18
Redwood Rgnl Park	54	2022-04-01
Redwood Rgnl Park	55	2022-05-11
Redwood Rgnl Park	59	2022-04-24
Rocky Ridge - EBMUD land near Las Trampas	11	2003-12-31
San Leandro Creek South - EBMUD	53	2021-04-25
San Leandro Reservoir - EBMUD	8	2024-05-01
San Leandro Reservoir - EBMUD	9	2024-05-01
San Leandro Reservoir - EBMUD	10	2014-04-29
San Leandro Reservoir - EBMUD	51	2021-05-01
San Leandro Reservoir - EBMUD	52	2021-05-01
San Pablo Creek North - EBMUD	35	2003-05-31
San Pablo Reservoir - EBMUD	38	2005-04-15
Siesta Valley, Upper - EBMUD land	26	2024-04-14
Tilden Rgnl Park - Jewel Lake/Nature area	29	2002-12-31
Tilden Rgnl Park - Wildcat Gorge	28	2001-05-09
Chabot Rgnl Park	12	1991-05-05	Historic
Chabot Rgnl Park	13	1987-12-31	Historic
Claremont Canyon Rgnl Park	25	1999-12-31	Historic
EBMUD land near Wildcat Rgnl Park	37	1999-12-31	Historic
Gudde Ridge, Moraga	56	1993-12-31	Historic
Gudde Ridge, Moraga	57	1993-12-31	Historic
Huckleberry Rgnl Preserve	46	1993-12-31	ID Uncertain
Las Trampas Rgnl Wilderness	15	1990-12-31	Historic
Norris Canyon	41	1976-12-31	Historic
Oakland Hills - other or unknown sites	21	1891-05-09	Historic
Oakland Hills - other or unknown sites	22	1980-12-31	Historic
Oakland Hills - other or unknown sites	23	1991-12-31	Historic
Ohlone Rgnl Wilderness	48	1993-12-31	ID Uncertain
Redwood Rgnl Park	5	1981-04-30	Historic
San Leandro Reservoir - EBMUD	18	1987-04-21	Historic
Sibley Rgnl Park	47	1993-12-31	ID Uncertain
Siesta Valley, Upper - EBMUD land	34	1999-12-31	Historic
Sobrante Ridge - S of Park	40	1993-03-31	Historic
Strawberry Canyon	27	1992-12-31	Historic
Sunol Rgnl Wilderness	42	1995-12-31	Historic
Walnut Creek	43	1862-05-01	Historic
Wildcat Rgnl Park	32	1999-12-31	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.