Utah Valley University Herbarium


Accession # 09196 
Family - UVUAPG III FamilyCronquist FamilyA Utah Flora
Species Ambrosia psilostachya DC.
Common name   western ragweed
J. Spencer   1063  
   with D. Atwood
Coll. Date 24 September 1998 
Geography Mexico.  Chihuahua.  
Locality 20 miles west from Mata Ortiz Junction, Sierra La Brena, E slope of Sierra Madre Occidental. 
Elev.: 6700 ft. (2043 m.)
Habitat Notes Pine-oak-manzanita, grass shrubland. 
Latitude Longitude 30° 6'  23" N, 108° 14'  45" W
Datum Not recorded
Uncertainty Not calculated


Synonyms recognized by ITIS (bold taxon is currently accepted):

     Ambrosia psilostachya DC.

     Ambrosia californica Rydb.
     Ambrosia coronopifolia Torr. & Gray
     Ambrosia cumanensis auct. non Kunth
     Ambrosia psilostachya var. californica (Rydb.) Blake
     Ambrosia psilostachya var. coronopifolia (Torr. & Gray) Farw.
     Ambrosia psilostachya var. lindheimeriana (Scheele) Blank.
     Ambrosia rugelii Rydb.

Common Name(s): Cuman ragweed, perennial ragweed, western ragweed.

Taxonomic Hierarchy: (ITIS TSN=36516, click for more information and references)

        Kingdom: Plantae
            Subkingdom: Tracheobionta
                Division: Magnoliophyta
                    Class: Magnoliopsida
                        Subclass: Asteridae
                            Order: Asterales
                                Family: Asteraceae
                                    Genus: Ambrosia
                                        Species: Ambrosia psilostachya


Available images of this specimen (click to view):
specimen image: 09196s3.jpg

Images of other samples of the same species:
specimen image: 02502s3.jpg 
specimen image: 03840s3.jpg 
specimen image: 10889s3.jpg 

Nearby Accessions

Other accessions in the database collected near this one:

Accession Name Dist., dir.
10080 Lopezia gracilis     88 ft. E


Nearby locations from the USGS Geographic Name Information System (GNIS) database:

Name County Dist., dir. Elevation (ft.) 7.5' Quad Name


Taxon Links for species Ambrosia psilostachya  DC.

CalPhotos, Berkeley Digital Library Project

CNPS Manual of California Vegetation Database

USDA Plants database
University of Washington Herbarium: Plants of Washington (images)

Texas A&M University: Image Library (images)

Lady Bird Johnson's Wildflower Center

Google Images

External link to this species in the UVU Herbarium:

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