Plum
domestica ) and the diploid Japanese plum ( Prunus salicina and hybrids), play a significant, commercial role. The plum is a drupe, so its firm and juicy flesh [...] fruit comes in many species, and taxonomists cannot agree on how many exactly. Depending on who you are asking to, between 19 and 40 different species of plum [...] single, hard seed. The plum is usually not too big (between 1-3 inch diameter) and its shape is globose or more oval. The plum’s skin is soft with a natural