Botanical Latin: An Essay & Pronunciation Guide by Tom Fischer
Aesculus hippocastanum, horse chestnut
This guide is the cumulative result of the guides I prepared for Horticulture magazine between 2002 and 2008, which is why some genera are richly represented and others aren’t. In general, the recommended pronunciations accord with older references that I have found to be both consistent and reliable, rather than with current popular usage, which is often inconsistent and unreliable. (For a lengthier discussion of the thinking behind the recommendations, see my article, “How Do You Say That? A Guide to the Perversities of Botanical Latin.”)
Of particular interest is his his discussion of how to pronounce a species or genus name that is based on a personal name (for example, davidii, middendorfii, Kniphofia). Do take some time exploring his very rich and rewarding site.