The Botany of Iceland - 01.12.1928, Qupperneq 3

PREFACE.
The present work is based exclusively on collections brought
horne by myself from a journey in Iceland in the summer of
1914. I have not been able to employ the material collected by
others, the indications of the localities on the labels of tlie speci-
mens being hardly ever exhaustive enough to provide sufficiently
accurate information as to the nature of the habitat. Hence, since
I have not examined samples collected by others, I have not fol-
lowed the method employed in my earlier work »The Freshwater
Cyanophyceæ of Iceland« (1923), but liave given a list of the indi-
vidual samples examined, marked in each case with the collection
number. To these numbei'S I then refer in the systematic list of
the species. Aerial Cyanophyceæ being included in the aforemen-
lioned work, I give no furtlier systematic list of them, but refer
the reader to my previous mention of them (1923). At p. 254 of
the same paper will be found a description of my travelling route,
and at p. 259 I give an account of the boundaries of the phyto-
geographical provinces into which I divide the island, to which
account I refer the reader.
To the Trustees of the Carlsberg F'und, who have granted
financial aid for the completion of this work, I beg to express my
best thanks.
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