Multiple choice general knowledge What is it commonly known as... Pyrus communis Pineapple Custard apple Pear Plum Reveal answer Fill a bubble to check yourself C Correct answer Explanation Pyrus communis is the botanical name for the common pear tree. Pineapples are Ananas comosus, custard apple is Annona reticulata, and plums are Prunus domestica. The Pyrus genus includes all pear varieties.