Systematic studies on the zygophyllaceae of Saudi Arabia : two new subspecies combination in tetraena maxim

الملخص EN

Tetraena propinqua (Decne.) Ghazanfar and Osborne ssp.

propinqua Alzahrani, and Tetraena propinqua (Decne.) Ghazanfar and Osborne ssp.

migahidii (Hadidi ex Beier & Thulin) Alzahrani, are described and illustrated as new subspecies combination nova from Saudi Arabia.

The diagnostic characters, description, detailed illustrations, geographical distribution, key to subspecies and taxonomic discussion are provided.

The similarities and significant differences between the two subspecies are confirmed by PCoA and UPGMA analyses.

The World Conservation Union (IUCN) threatened category and observations on the population are noted.