北京水晶(jing)(jing)杏(xing)(xing)主要分布(bu)在海淀區西山(shan)(shan)東麓沿線,三面環山(shan)(shan)形(xing)成(cheng)一個山(shan)(shan)洼(wa),4月(yue)初(chu)開(kai)花、6月(yue)上旬成(cheng)熟(shu)。水晶(jing)(jing)杏(xing)(xing)果(guo)(guo)實圓或長(chang)圓形(xing),黃白色,陽面有紅暈,表面光(guang)滑,果(guo)(guo)肉淡白色,呈半(ban)透明狀,朦朧(long)中(zhong)可見(jian)到杏(xing)(xing)核,故名水晶(jing)(jing)杏(xing)(xing)。水晶(jing)(jing)杏(xing)(xing)口(kou)感極(ji)甜,杏(xing)(xing)汁液多,品質極(ji)優(you),平均(jun)果(guo)(guo)重80克(ke),最大(da)可達100克(ke)。