CNPS Inventory Plant Detail

Ambrosia monogyra

Common Name:	singlewhorl burrobrush
Family:	Asteraceae
Synonyms:
Element Code:	PDAST50010
Full Name:	Ambrosia monogyra Torr. & Gray
USDA PLANTS Symbol:	HYMO

Biology
Lifeform: perennial shrub Blooming Period: August - November Habitat: sandy. • Chaparral • Sonoran desert scrub

Rarity Status
CA Rare Plant Rank: 2.2 Rare, threatened, or endangered in California, but more common elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.2 S2: Imperiled. .2: Threatened. Global Rank: G5 G5: Secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 16
Element Occurrence Ranks:

A B C D X U

0 0 0 0 0 16

Population Status:

Historic >20 yrs	Recent <=20 yrs
12	4

Presence:

Present Extant	Possibly Extirpated	Extirpated
16	0	0

Notes
Possibly threatened by trail maintenance and non-native plants. See Hymenoclea monogyra in TJM (1993). See Madrono 49: 143 (2002) for taxonomic treatment. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 2007-02-21 Last Update: 2013-04-30

Location

Elevation: 10 - 500 meters

California Endemic: no

States: California, Arizona, Baja California, New Mexico, Nevada, Sonora, Texas

California Counties and Islands: name (code)
Riverside (RIV), San Bernardino (SBD) (?), San Diego (SDG)

Quads: name (DWR code) USGS code
Dulzura (010A) 32116F7, Jamul Mountains (010B) 32116F8, Otay Mesa (010C) 32116E8, Otay Mountain (010D) 32116E7, National City (011A) 32117F1, Imperial Beach (011D) 32117E1, La Mesa (022D) 32117G1, San Jacinto Peak (083C)? 33116G6, Palm Springs (083D) 33116G5, San Bernardino North (107A) 34117B3, Devore (107B)(?) 34117B4

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

3229

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-117.0,32.75