Introductory
SPECIES: Ambrosia psilostachya | Western Ragweed 



ABBREVIATION : 
AMBPSI

SYNONYMS : 
   Ambrosia rugelii Rydb.
   Ambrosia coronopifolia T. & G.


SCS PLANT CODE : 
   AMPS


COMMON NAMES : 
   western ragweed
   perennial ragweed
   common ragweed
   ragweed


TAXONOMY : 
The currently accepted name of western ragweed is Ambrosia psilostachya
DC.; it is a member of the sunflower family (Asteraceae).  There are
three recognized varieties [51]:

        A. p. var. psilostachya
        A. p. var. californica (Rydb.) Blake
        A. p. var. lindeheimerana (Scheele) Blank.


LIFE FORM : 
Forb

FEDERAL LEGAL STATUS : 
No special status

OTHER STATUS : 
NO-ENTRY


COMPILED BY AND DATE : 
Diane S. Pavek, November 1992


LAST REVISED BY AND DATE : 
NO-ENTRY


AUTHORSHIP AND CITATION : 
Pavek, Diane S. 1992. Ambrosia psilostachya. In: Remainder of Citation

Related categories for Species: Ambrosia psilostachya | Western Ragweed