01370nas a2200133   4500008004100000245011400041210006900155300001200224490000800236520091400244100001801158700001601176856004401192       2015                        eng d00aStatus, Distribution, and Nomenclature of Northern Quillwort, Isoetes septentrionalis (Isoetaceae), in Canada0 aStatus Distribution and Nomenclature of Northern Quillwort Isoet  a174-1800 v1293 aThe lycophyte Northern Quillwort (Isoetes septentrionalis D. F. Brunton, sp. nov.) is the northern component of the riverbank Quillwort (I. riparia) complex. it is locally abundant in southeastern Ontario and southwestern Quebec and is also widely distributed in the northeastern united States. in Canada, it is largely confined to river and lake shores along post-glacial drainage outlets within the limits of the post-glacial Champlain Sea. it is frequently found in association with other Isoetes, especially Dodge’s Quillwort (I. ×dodgei A. A. Eaton), its sterile hybrid with Spiny-spored Quillwort (I. echinospora Durieu). the Canadian population of I. septentrionalis appears to be stable. Although first proposed at species level over a century ago, the nomenclature of this taxon has remained unresolved. It is clarified in the present study, in which I. canadensis var. robbinsii is lectotypified.1 aBrunton, D.F.1 aMcNeill, J.  uhttps://isoetes.myspecies.info/node/219