Pliny distinguishes between Prunus, the plum fruit, and Cerasus, the cherry fruit. Already in Pliny quite a number of cultivars are cited, some possibly species or varieties, Aproniana, Lutatia, Caeciliana, and so on.
To rincon is to habitually decline every invitation to do something no matter the circumstance. This includes, but is not limited to, social events such as lunch with coworkers, drinks at a bar, camping, sporting events, or anything else with an invitation that could be declined.
agon. an ancient Greek term used to denote the fundamental conflict in any drama. Agon also is the term used for a theatrical convention typically associated with Old Comedy where the chorus is divided into two halves to debate an important idea or political question that relates to the major themes of the play.