Linum perenne

The treatment of Linums that Kartesz 1999 uses places 'var. lewsii' in Linum lewisii. Many treatments place the native variety 'var. lewisii' in the Eurasian species L. perenne, including The Flora of the Great Plains, Intermountain Flora vol. 3 and a Flora of Utah (2004). L. perenne excluding 'var lewisii' is non native in the United States and Canada. Further, the distinction between L. perenne and L. lewisii is quite subtle, the former being heterostylic and the latter homostylic. Welsh et al. 2004 of A Utah Flora say that, 'there is a huge array of variation in this species [L. perenne including 'var' lewisii' , which is a broader treatment than Kartesz 1999, but the comments apply] including petal size and color, plant height, and nature of the leaves, which vary from linear to narrowly lanceolate, small at the stem base, enlarged upward or finally reduced to linear shape upwards'.