Hi everyone. I'm looking for good guide on how to visually identify the 5 different domesticated pepper species. Searched on Google and YT but tbh, the guides there weren't very good.

I bought an old book on peppers: Peppers of the World- An Identification Guide. And it had this key. Does anyone know if this is still accurate? The book is from 1996, so almost 30 years old and a lot of other information is now outdated but perhaps the key traits between the species are still the same?
Would also love suggestions to good quality guides on how to ID the pepper species if anyone has any recommendations

I am no pepper specialist, but I would say that that key would still be good. Don't think that there have been any major changes within pepper species since then