- – "Cenchrus incertus" auct. fl. graec., non
- – "Cenchrus tribuloides" auct. fl. graec., non
The plants were previously identified as C. tribuloides L. (Biel & Tan 2016: 432); Cenchrus spinifex Cav. is even larger in all its floral parts (spines and spikelets) and the ‘burs’ are even more densely villous pubescent, but the species is not known to be weedy.
• Biel B. & Tan K. 2017: Reports 9–32. – Pp. 121–124 in: Vladimirov V., Aybeke M. & Tan K. (ed.), New floristic records in the Balkans: 32. – Phytol. Balcan. 32: 119–146.
• Verloove, F. & Sánchez Gullón, E. 2012: A taxonomic revision of non-native Cenchrus s.str. (Paniceae, Poaceae) in the Mediterranean area. – Willdenowia 42: 67-75.