That What I remember from this excellent documentary about citrus[0].

I would also plug "Weird explorer" playlist on citrus[1]. His youtube channel where he tries to cover as much fruits as he can(his estimate is around 1% of all fruits)

[0] https://www.youtube.com/watch?v=XkMKJCvJKBk

[1] https://www.youtube.com/watch?v=diy5s8_gNYM&list=PLvGFkMrO1Z...