Phylogeny of 53 individuals of Phalaris arundinacea and five outgroup taxa, based on ITS variation. Included are 60 individuals sampled for this study as well as the only GenBank sample of P. arundinacea found with the ITS-short sequence [KF753778]. Asterisks indicate samples obtained from herbarium material. The tree is a strict consensus from the MP analysis with Majority Rule consensus values above nodes and NJ/ML bootstrap support values below nodes. Two clades can be seen: the deletion clade (ITS-short) and the full length ITS clade (ITS-long). Sample details are given in Tables