Muhlenbergia is a rather large genus with ca. 155 species. Most are native in the New World (some in southeastern Asia). Several however have become widely dispersed as weeds in several different warm-temperate and subtropical regions of the world. One species, Muhlenbergia mexicana, has been recorded in Belgium.
Jansen P. (1949) Floristische aantekeningen XXXV. Nederl. Kruidk. Arch. 56: 243-248.
Peterson P.M. (2003) Muhlenbergia. In: Barkworth M.E. & al. (eds.), Flora of North America north of Mexico, vol. 25: 145-200. Oxford University Press, New York-Oxford.
Peterson P.M., Romaschenko K. & Johnson G. (2010) A phylogeny and classification of the Muhlenbergiinae (Poaceae: Chloridoideae: Cynodonteae) based on plastid and nuclear DNA sequences. Am. J. Bot. 97(9): 1532-1554.