The fruit of these plants are known as stone fruit -LRB- botanically , a drupe -RRB- , as each fruit contains a hard shell -LRB- botanically , the endocarp -RRB- called a stone or pit , which contains the single seed .

The fruit of these plants are known as stone fruit -LRB- botanically , a drupe -RRB- , as each fruit contains a single , hard-shelled seed called a stone or pit .
