thuja again

I realise this stuff may be quite a specific obsession of mine but I'm still very intrigued by the migration of the ancient term thuja from the plant it originally designated to a genus that isn't represented in Europe or Africa at all. The Oxford English Dictionary supplies a scrap of information about when the white cedar first received the name thuja:

Camerarius, 1577, has thya from Pliny and thuia after Gaza; he applies the name to the American Arbor Vitæ, Thuya occidentalis.

I think this must be a reference to a German botanist called Joachim Camerarius the younger (1534-1598) and, since Cartier's attention was only drawn to the white cedar in the 1530s, the text mentioned here - whatever it is - is very early. However, although I've cast about a bit to see if I can locate something that Camerarius published in 1577, I've drawn a blank. So, I've written to the enquiries department at the OED to ask if they have a fuller reference. (Maybe this *is* becoming a bit obsessive!)