References:

• Boulos, L. & M. N. El-Hadidi The weeds of Egypt. 1984 (Weeds Egypt)
• Carlón, L. et al. Index of Orobanchaceae (on-line resource). 2005- (Index Orobanchaceae)
• CIBA-GEIGY, Basel, Switzerland The CIBA-GEIGY Weed Tables. 1974 (Weed TabCIBA)
• Cufodontis, G. Enumeratio plantarum aethiopiae: Spermatophyta. 1953-1972 (F EthiopCuf)
• Erhardt, W. et al. Der große Zander: Enzyklopädie der Pflanzennamen. 2008 (Zander Ency)
• Fennane, M. et al., eds. Flore pratique du Maroc. 1999- (F Prat Maroc)
• Greuter, W. et al., eds. Med-Checklist. 1984- (L Medit)
• Groth, D. 2005. pers. comm. (pers. comm.)
• Holm, L. et al. A geographical atlas of world weeds. 1979 (Atlas WWeed)
• Komarov, V. L. et al., eds. Flora SSSR. 1934-1964 (F USSR)
• Rechinger, K. H., ed. Flora iranica. 1963- (F Iran)
• Rehm, S. Multilingual dictionary of agronomic plants. 1994 (Dict Rehm)
• Thulin, M., ed. Flora of Somalia. 1993- (F Somalia)
• Tutin, T. G. et al., eds. Flora europaea. 1964-1980 (F Eur)
• USDA/ARS INVADERS database system. The University of Montana (on-line resource). (Invaders Database)