2. Polypogon monspeliensis (L.) Desf. (Medit.) – A rather regular but usually ephemeral alien. Early records were poorly documented but Polypogon monspeliensis was already present in Belgium before 1836 (Verloove 2006). Formerly rather common in the Vesdre valley as a wool alien, at least between 1881 and 1970. At present mostly associated with grains and seen most years near granaries, unloading quays,… Occasionally seen in urban areas (pavement, foot of walls,…) but usually rather ephemeral. Increasingly found in sand-raised sites, primarily in port areas (Antwerpen, Gent). In such places recently locally naturalised, often in abundance (see also Polypogon maritimus). It usually grows on temporarily muddy banks of ponds, along ditches,… In Wallonia apparently much rarer and usually rather ephemeral. However, recorded in abundance in a gravel-pit near Tournai (Vaulx) in 2006 and possibly locally becoming naturalised.
In some areas, especially in the port of Antwerpen (but possibly elsewhere too) confusion is likely with the very similar Polypogon maritimus (see Verloove & al. 2008).
Verloove F. (2002) Ingeburgerde plantensoorten in Vlaanderen. Mededeling van het Instituut voor Natuurbehoud n° 20: 227 p.
Verloove F. (2006) Catalogue of neophytes in Belgium. Scripta Botanica Belgica 39: 89 p.
Verloove F., De Beer D., Van de Vijver B. & Suys W. (2008) Polypogon maritimus, een miskende neofyt in België. Dumortiera 93: 26-28.
Verloove F. & Lambinon J. (2008) Neophytes in Belgium: corrections and adjustments. Syst. Geogr. Pl. 78: 63-79.
Verloove F. & Vandenberghe C. (1995) Nieuwe en interessante voederadventieven voor de Belgische en Noordfranse flora, hoofdzakelijk in 1994. Dumortiera 61-62: 23-45.