Apocynum androsaemifolium

bitter dogbane, dogbane

Family:Apocynaceae

Rarity

CNPS-EB: A2

6 current natural populations

Criteria:

Small Populations

Observations

Key

Ecology

Flowers May - October

Habitats:

Chaparral
Open Dry Slope
Rock, Tallus, Scree

All Apocynum

A. androsaemifolium

A. cannabinum (B)

References

Synonyms

Apocynum ×floribundum
Apocynum androsaemifolium var. glabrum
Apocynum androsaemifolium var. nevadense
Apocynum diversifolium
Apocynum medium var. floribundum
Apocynum pumilum var. rhomboideum
Apocynum pumilum
Apocynum rhomboideum
Apocynum viarum

Populations

Key

Location	Pop ID	Last Recorded	Notes
Concord Naval Weapons Station	6	2008-12-31
Dimond Park/District, Oakland	13	2014-04-12
Martinez - other or unknown sites	16	2004-07-09
Redwood Rgnl Park	7	2021-05-22
Tilden Rgnl Park - San Pablo Ridge	14	2018-04-28
Wildcat Canyon Road	5	2000-12-31
Chabot Rgnl Park	1	1981-07-23	Historic
Las Trampas Rgnl Wilderness	10	1991-06-01	Historic
Leona Heights Rgnl Park, or nearby	9	1990-12-31	Historic
Moraga - other or unknown sites	11	1993-12-31	Historic
Mt. Diablo State Park - South side	8	1939-12-31	Historic
Oakland Hills - other or unknown sites	12	1932-05-06	Historic
Redwood Rgnl Park	2	1993-06-13	Historic
San Leandro Reservoir - EBMUD	3	1996-05-31	Historic
Strawberry Canyon	4	1990-12-31	Historic
Sunol Rgnl Wilderness	15	2019-04-09	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.