Ambrosia chenopodiifolia

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Scientific Name: Ambrosia chenopodiifolia (Benth.) Payne
Common Name: San Diego bur-sage
Family:	Asteraceae
Element Code:	PDAST0C080
USDA Plants Symbol:	AMCH5
Synonyms/Other Names:

CA Rare Plant Rank:	2B.1
Fed List:	None
State List:	None
Global Rank:	G2G3
State Rank:	S1
Other Status:	SB_CalBG/RSABG; SB_CRES
CRPR Changes: changed from 2.1 to 2B.1 on 2013-06-12
Add Date:	1974-01-01
Date Edited:	2022-02-01

Lifeform: perennial shrub

Blooming Period: Apr-Jun

Elevation:
55 - 155 meters
180 - 510 feet

General Habitats:

Microhabitat Details:

Microhabitat:

Notes: Known in CA from fewer than 15 occurrences. Threatened by development.
Threats:
Taxonomy:

THREAT LIST:
Threat List Total:	10
	Total EOs	% of EOs
EOs with Threat Listed:	15	71 %
Development	11	52%
ORV activity	6	28%
Vandalism/dumping/litter	3	14%
Road/trail construction/maint.	2	9%
Non-native plant impacts	2	9%
Foot traffic/trampling	2	9%
Grazing	1	4%
Mining	1	4%
Agriculture	1	4%
Recreational use (non-ORV)	1	4%

Occurrence Status:
Historical >20 Years	10
Recent <=20 Years	11

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

California Counties and Islands: Name (Code)
San Diego (SDG)

Quads: Name (Quad Code)
Imperial Beach (3211751), National City (3211761), Otay Mesa (3211658)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Presumed Extant

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CNPS Rare Plant Inventory