CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record ambrosia_monogyra - Wed, Dec. 8, 2021, 05:06 ET b
Ambrosia monogyra
common namesinglewhorl burrobrush
CalPhotos image
more photos
©   Follow image link for photo data, and for images listed as "Hymenoclea monogyra".
Link to images listed as "Ambrosia monogyra"
life form shrub
CA Rare Plant Rank
List 2B.2
LIST 2B: Rare, threatened, or endangered in California, but more common elsewhere.
     0.2: Fairly endangered in California
state rank
S2      ranking system key
global rank
G5     G5: demonstrably secure to ineradicable
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (14):
Dulzura (010A) 3211667, Jamul Mountains (010B) 3211668, Otay Mesa (010C) 3211658, Otay Mountain (010D) 3211657, National City (011A) 3211761, Imperial Beach (011D) 3211751, Cuyamaca Peak (020A) 3211685, Descanso (020D) 3211675, La Jolla (022C) 3211772, La Mesa (022D) 3211771, Mecca (064D) 3311651, San Jacinto Peak (083C)? 3311676, Palm Springs (083D) 3311675, Devore (107B)(?) 3411724
quad data info

Counties, states, regions:
Riverside (RIV), San Bernardino (SBD)(?), San Diego (SDG), Arizona (AZ), Baja California (BA), New Mexico (NM), Nevada (NV), Sonora - Mexico (SO), Texas (TX)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Sonoran desert scrub (SDScr)/sandy
blooming period Aug-Nov  
elevation range10 - 500 meters
Possibly threatened by trail maintenance and non-native plants. See Hymenoclea monogyra in TJM (1993). See Madrono 49: 143 (2002) for taxonomic treatment.
full nameAmbrosia monogyra Torr. & Gray
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym   Element Code  PDAST50010
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
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Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Wed, Dec. 8, 2021 from

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