There are books, pamphlets if you will, on Botanical Latin. I am sure that these things can be found on line. They often deal with pronunciation.
For example “lindleyi” is Lind-Lee-eye”.
The “ch” in leucochilum is a hard ‘K’ sound. Lew-co-K-eye-lum.
The one that always puts a smile on my face is Brassavola. Brass-ah-voh-la. A few pronounce it as Bra-sav-oh-la.
As Rob said, plant names based on a persons name, Stanhope-ah, is named after the Earl of Stanhope. At least I seem to remember him as an Earl.
But I can tell you this, I minored in Botany back in college. I was more comfortable with pronunciations back then but as I have gotten older, I don’t use them enough, and I find some are troublesome.
Fredclarkeara is Fred-Clark-ee-‘r’-ah.
Good luck!!!