Juncus arcticus var. montanus (Engelmann) S.L. Welsh

Juncus arcticus var. montanus (Engelmann) S.L. Welsh is a synonym sensu Kirschner et al., 2002 of:

Juncus balticus subsp. ater (Rydberg) Snogerup, an accepted subspecies name sensu Kirschner et al., 2002.