There's no one way to pronounce Latin plant names. There are two!
Learning two patterns and a handful of rules will relieve much of the confusion surrounding pronunciation. It's crucial to learn the correct scientific names of plants and communicate them clearly. This one-minute audio sample from the Introduction will help you understand and be understood better by others:
From the Introduction to "A Guide to Pronouncing Plant Names."
This is not a dictionary. Dictionaries disagree. "A Guide" is a tutorial that explains features of botanical nomenclature, and instills them in a variety of drills composed of more than 230 plant names. The patterns and ideas presented can be applied to species names in general. See how it works with this audio sample:
Excerpts from the 3 Sections of "A Guide to Pronouncing Plant Names."
Based in part on listening to lectures by herbalists, botanists, taxonomists, naturalists and professional gardeners for how they say names, "A Guide" also features a bonus track of authentic 1st century Roman pronunciation. Here is an audio sample:
Roman Pronunciation of Botanic Names
Language! It is a seed, it is a flower, it is a vine. Thanks for your interest in "A Guide to Pronouncing Plant Names."