Molinia Schrank
As traditionally (i.e. broadly) circumscribed Molinia only counts two species in Eurasia. However, species boundaries within Molinia are rather controversial. The exceedingly variable Molinia caerulea s.l. is native in Belgium (Lambinon & al. 2004). Some of its infraspecific taxa are sometimes given specific rank.
References:
Conert H.J. (1981) Über das Rohrartige Pfeifengras, Molinia arundinacea Schrank. Ber. Bayer. Bot. Ges. 52: 5-14.
Dancák M. (2002) Taxonomický okruh Molinia caerulea ve strední Evrope. Zprávy Ces. Bot. Spolec., Praha 37: 35-41. [available online at: http://old.botany.upol.cz/prezentace/dancak/sbornik.pdf]
Dancák M., Duchoslav M. & Trávnícek B. (2012) Taxonomy and cytogeography of the Molinia caerulea complex in central Europe. Preslia 84(2): 351-374. [available online at: http://www.preslia.cz/P122Dancak.pdf]
Frey L. (1975) Badania taksonomiczne nad rodzajem Molinia Schrank w Polsce. Fragm. Florist. Geobot. 21: 21-50.
Jirásek V. (1965) Einige taxonomische Probleme der Gattung Molinia (Schrank) (Poaceae). Acta Univ. Carol. Biol. 1965: 227-243.
Lambinon J., Delvosalle L., Duvigneaud J. (avec coll. Geerinck D., Lebeau J., Schumacker R. & Vannerom H.) (2004) Nouvelle Flore de la Belgique, du Grand-Duché de Luxembourg, du Nord de la France et des Régions voisines (Ptéridophytes et Spermatophytes). Cinquième édition. Jardin botanique national de Belgique, Meise: CXXX + 1167 p.
Milkovits I. & Borhidi A. (1987) Studies of Molinia caerulea complexes in Hungary. Acta Univ. Ups./Symb. Bot. Ups. 27: 139-145.
Sterk A.A. & Ter Laak H.J. (1972) Over de variabiliteit van Molina caerulea (L.) Moench in Nederland. Gorteria 6: 95-103.
Taylor K., Rowland P. & Jones H.E. (2001) Molinia caerulea (L.) Moench. J. Ecol. 89(1): 126-144.
Trist P.J.O. (1988) Two subspecies of Molinia caerulea (L.) Moench in the British Isles. Watsonia 17: 153-157.
Trist P.J.O. (1998) Molinia. In: Rich T.C.G. & Jermy A.C. (eds.), Plant crib: 369-370. BSBI, London.
Tutin T.G. (1980) Molinia. In: Tutin T.G. & al. (eds.), Flora Europaea, vol. 5. Cambridge University Press, Cambridge: 254.