Raphanus sativus, radish
RABANO GIGANTE DE MALLORCA
This seems to be some kind of large elongated radish
We saw this growing in the Royal Botanic Garden, Madrid in April 2018
Raphanus sativus is mentioned in THE MEDITERRANEAN GARDEN number 73, July 2013 in
THE MOUNT SCOPUS BOTANICAL GARDEN
AND NATIVE SPECIES OF ISRAEL FOR WIDER CULTIVATION IN GARDENS
By Michael Avishai, Avinadav Begin & Meni Neuman
Photographs of this garden can be seen here
http://www.mediterraneangardensocietyarchive.org/73-israel.html