Seeds of Doubt https://mosaicmagazine.com/picks/uncategorized/2013/09/seeds-of-doubt/

September 24, 2013 | Philologos
About the author: Philologos, the renowned Jewish-language columnist, appears twice a month in Mosaic. Questions for him may be sent to his email address by clicking here.

For two millennia, Jews have agreed on the identity of the four species of Sukkot plants; prior to  the rabbis, though, consensus is conspicuously absent.

Read more on Forward: http://forward.com/articles/184150/is-the-fruit-of-leviticus-really-an-etrog/