Feijoa:

Feijoa:

Feijoa O. Berg, Myrtaceae: See Acca O. Berg. .

Feijoa sellowiana:

Feijoa sellowiana (O. Berg) O. Berg., Myrtaceae: See Acca sellowiana (O. Berg) Burret.

I have no articles for this botanical term, but there might be some for the next level down (if found).