Data from: Cucumis omissus sp. nov. (Cucurbitaceae) from southern Arabia and Ethiopia and its phylogenetic position

The new species Cucumis omissus Thulin from Yemen, Oman and Ethiopia is
described and illustrated. According to phylogenetic analyses based mainly
on nuclear ribosomal ITS sequences and chloroplast trnG sequences, the new
species is sister to C. hastatus in Somalia and Ethiopia. A map showing
the distributions of both C. omissus and C. hastatus is provided and
morphological differences between these two species are pointed out.
Cucumis omissus has been confused with C. pustulatus and C. prophetarum in
the literature and in herbaria, and morphological differences from these
two species are provided as well. Oreosyce africana is nested within
Cucumis in this, as well as in several previous studies. We clarify that
when O. africana is treated as a Cucumis, its correct name is C.
subsericeus.