Scientific Report of the project: al-‘Ulā DPA Project : Ethnographic, genetic, and morphometric analyses of the date palm agrobiodiversity in al-‘Ulā oasis. (Saudi Arabia). For AFALULA (Agence française pour le développement d'al-Ula) & RCU (Royal Commission for AlUla). This working list of the different types of cultivated date palms in the oasis of al-‘Ulā oasis (KSA) is produced by the al-‘Ulā DPA research project as a contribution to the development of the region and the preservation of its phoenicultural heritage, and as a working document for possible critical feedback. Around a hundred named types of date palm make up the great but little-known or underestimated wealth of this oasis, a significant proportion of which we consider to be at critical risk of extinction in the near future