Japanese chestnut + Persian lime

Japanese Chestnut (Castanea crenata) is a species of chestnut originally native to Japan and South Korea. It is a small to medium-sized deciduous tree growing to 10-15 m tall. The leaves are similar to those of the Sweet Chestnut, though usually a little smaller, 8-19 cm long and 3-5 cm broad. The flowers of both sexes are borne in 7-20 cm long, upright catkins, the male flowers in the upper part and female flowers in the lower part. They appear in summer, and by autumn, the female flowers develop into spiny cupules containing 3-7 brownish nuts that are shed during October.

Persian lime (Citrus ×latifolia) or Shiraz Limoo also known as Tahiti lime or Bearss lime (named after John T. Bearss, who developed this seedless variety about 1895 in his nursery at Porterville, California), is a citrus fruit related to the standard lime. It has a nearly thornless tree. The Persian lime is of hybrid origin, most likely from a cross between key lime (Citrus aurantiifolia) and either lemon (Citrus ×limon) or citron (Citrus medica).