Abstract
Uromyces lineolatus (Desm.) Schroet, in aecidial stage was first in Poland on Glaux maritima in 1963 in Ciechocinek and later in Wilczkowica and Kołobrzeg. On this host lives a highly specialized biological race Uromyces lineolatus f. sp. glaucis-scipi O. Jaap. Glaux maritima is an obligatory halophyte and it can be supposed that the parasitized rust fungus is also a halofilic from. In present work there are also some new localities of Uromycea lineolatus on Bulboschoenus maritimus in Poland (Gniewkowo, Rabin, Wiliczkowwice, Kołobrzeg and Zgłowiączka - Majewski's unpublished dates) and in Germany (Hiddensee and Artern) on both hosts.