I have two data frames:
df1
Species               ID
Zanthoxylum bungeanum CNRhis0124310    
Zeuxine strateumatica CNRhis0124169   
Ziziphus jujuba       CNRhis0123820
df2
Species Source    
Zizania latifolia Huada   
Ziziphus jujuba   Huada
Which function can I use to make it look like this
Species ID Source    
Zanthoxylum bungeanum CNRhis0124310 NA    
Zeuxine strateumatica CNRhis0124169 NA    
Zizania latifolia NA Huada    
Ziziphus jujuba CNRhis0123820 Huada
So that I have all three columns, but the one with same species name get merged
Thanks!
 
    