Juglans neotropica being ripe. The sap of the fruit husk is a strong dye and can stain hands and clothing. The nut inside is within a much harder and more difficult to crack shell than Persian walnuts, but the meat inside is comparable in flavour, perhaps a bit sweeter. "Tocte", the fruit of the Andean walnut, are often sold in the farmer's markets of Ecuador. The process of husk removal often stains the shells of the nuts black. Like all walnuts, unripe fruit husks produce a strong yellow dye that does not require mordant; ripe fruits produce a strong red to brown
Fruit anatomy the inner part of the peel and is commonly removed before eating. In citron fruit, where the mesocarp is the most prominent part, it is used to produce succade. Endocarp (from Greek: "endo-", "inside" + "-carp", "fruit") is a botanical term for the inside layer of the pericarp (or fruit), which directly surrounds the seeds. It may be membranous as in citrus where it is the only part consumed, or thick and hard as in the stone fruits of the family Rosaceae such as peaches, cherries, plums, and apricots. In nuts, it is the stony layer that surrounds the kernel