Hi, 

Feel free to edit certain trees from taxon to the appropriate genus and species tags if you are confident in the classification. The reason for using taxon was becuase it is the more general tag that can include in a single tag both genus and species or only genus and for certain trees only the genus was available so it would be incorrect to identify it as the species. Similarly, certain trees include variant and cultivar information which  shouldn't be mapped with the species tag. Since I don't have as much experience with botany, I decided to put the information in the more general taxon tag to avoid mapping errors