Ambrosia psilostachya DC.  
Family: Asteraceae
Perennial Ragweed
[Ambrosia californica Rydb.,  more]
Ambrosia psilostachya image
Max Licher  
Ambrosia psilostachya image
Max Licher  
Ambrosia psilostachya image
Max Licher  
Ambrosia psilostachya image
Max Licher  
Ambrosia psilostachya image
Ambrosia psilostachya image
Max Licher  
Ambrosia psilostachya image
Max Licher  
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Patrick Alexander  
Ambrosia psilostachya image
Patrick Alexander  
Ambrosia psilostachya image
Patrick Alexander  
Ambrosia psilostachya image
Patrick Alexander  
Ambrosia psilostachya image
Patrick Alexander  
Ambrosia psilostachya image
Patrick Alexander  
Ambrosia psilostachya image
Patrick Alexander  
Ambrosia psilostachya image
Liz Makings  
Ambrosia psilostachya image
Liz Makings  
Ambrosia psilostachya image
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Ambrosia psilostachya image
The National Science Foundation
This project made possible by National Science Foundation Award 1410069