“…During this work the Scandinavian flora was also considered, thanks to verbal information from Dr. N. S Y L V~N and comparison with different Swedish textbooks. -The chromosome numbers of the species in these genera were chiefly looked for in the following chromosome lists: GAISER (1926GAISER ( , 1930GAISER ( a, 1930GAISER ( b, 1933, TISCHLER (1931) and AVDULOW (1931). Additional data were gathered from WANSCHER (1931,1932,1933), SIMONET (1934 b), HOFELICH (1935), GRAZE (1935), HOLLINGSHEAD and BABCOCK (1930), BABCOCK and CAMERON (1934), AFZE1,IUS (1924), BRUUN (1932), FAGERLIND (1934), CLAUSEN (1931 b) and PETERSON (1935).…”