Citrus × lumia

The lumia (Citrus lumia Risso. & Poit., or Citrus aurantiifolia (Christm. et Panz.) Swingle var. lumia hort.) is also called the pear lemon (Citrus × lumia 'pyriformis'), since its shape resembles a pear. It is also called French lime and sometimes sweet lemon, even though it is not necessarily sweet. In German, the lumia is called Birnenlimone, Patriarch-Citrone, Süsse Limone or Birnenlumie; in French it is called Poire du commandeur. In Chinese it is called Lu mi (露蜜), in Japanese Rumii (ル ミー), Vietnamese, Chanh Pháp. The fruit resembles a pear in shape, has a thick peel and is not very juicy. Like a citron, it can grow to a formidable size....read more on Wikipedia.