Bromus lanceolatus Roth (syn.: B. divaricatus Rhode ex Loisel., B. macrostachys Desf.; incl. B. lanuginosus Poiret) (Medit., SW-As.) – A rare and ephemeral alien. Apparently first collected on rough ground in Brugge in 1888. Formerly exceptionally recorded in the Vesdre valley as a wool alien. Furthermore observed in Antwerpen, Brussel, Jonckeu and Val-Benoît but most records are from the 19th or the first half of the 20th century. In more recent times apparently much decreasing and always associated with grain importation. Seen, for instance, on a grain dump in Andrimont (in 1954) and on the unloading quay for cereals at the Kattendijkdok in the port of Antwerpen (in 2000).
At least part of the collections (incl. the recent ones) is distinguished by densely pubescent spikelets and belongs to var. lanuginosus (Poiret) Dinsm. (syn.: Bromus lanuginosus). Variety lanceolatus always has glabrous spikelets.
Selected literature:
Acedo C. & Llamas F. (1994) Bromus alopecuros a new record for the Iberian Peninsula, with morphological, chorological and nomenclatural observations on the B. lanceolatus group. Fl. Medit. 4: 203-212.
Ainouche M., Misset M.T. & Huon A. (1996) Patterns of genetic differentiation in two annual bromegrasses, Bromus lanceolatus and B. hordeaceus (Poaceae). Pl. Syst. Evol. 199: 65-78.
Clement E.J. (1980) Adventive news 18. Mixed bag. BSBI News 26: 12-18.
Jansen P. & Wachter W.H. (1917) Floristische aanteekeningen XIII. Nederl. Kruidk. Arch. 1917: 218-228.