DaikonBlack Spanish or Black Spanish Round occur in both round and elongated forms, and are sometimes simply called the black radish or known by the French name Gros Noir d'Hiver. It dates in Europe to 1548, and was a common garden variety in England and France during the early 19th century. It has a rough black skin with hot-flavored white flesh, is round or irregularly pear shaped, and grows to around 10 cm (4 in) in diameter.
Daikon refers to a wide variety of winter radishes from Asia. While the Japanese name daikon has been adopted in English, it is also sometimes called the Japanese radish, Chinese radish, Oriental radish or mooli (in India and South Asia). Daikon commonly have elongated white roots, although many varieties of daikon exist. One well known variety is April Cross, with smooth white roots. The New York Times describes Masato Red and Masato Green varieties as extremely long, well suited for fall planting and winter storage. The Sakurajima daikon is a hot-flavored variety which is typically grown to around 10 kg (22 lb), but which can grow to 30 kg (66 lb) when left in the ground
From here https://en.wikipedia.org/wiki/Radish