Náttúrufræðingurinn - 1985, Síða 38

úr hér og hvar. Áin breiðir þarna
nokkuð úr sér, en greinilegt er, að hún
flæðir yfir allstórt svæði í leysingum á
vorin. Þess á milli fýkur úr söndunum í
jaðra hraunsins og hólanna, svo að
gróður er með öðrum svip en inni á
hraunbreiðunni, þar sem gamburmosi
(Racomitrium lanuginosum (Hedw.)
Brid.), hraunbreyskingur (Síereo-
caulon vesuvianum Pers.) og grá-
breyskingur (S. arcticum Lynge)
sveipa dældir og nibbur.
HEIMILDIR
Degelius G. 1935. Das ozeanische Ele-
ment der Strauch- und Laubflech-
tenflora von Skandinavien. - Acta
Phytogeographica Suecica Nr. 7.
Uppsala.
Deichmann Branth J.S. 1903. Lichenes Is-
landiae. — Botanisk Tidsskrift 25, 2:
197-220.
Gallöe D. The Lichen Flora and Lichen
Vegetation of Iceland. - The Botany
of Iceland. II 6: 103-248.
Grönlund C. 1870—1871. Bidrag til Opl-
ysning om Islands Flora. — Botanisk
Tidskrift 4: 147-172.
Guðmundur Kjartansson. 1946. Hekla. —
Arbók Ferðafélags íslands 1945.
Hooker W.J. 1813. Journal of a Tour in
Iceland in the Summer of 1809. — Sec.
ed. II, Appendix. E. Icelandic Plants.
London.
Hörður Kristinsson. 1964. íslenskar engja-
skófir. — Flóra, tímarit um íslenska
grasafræði. 2: 65—82.
SUMMARY
The lichen
Lobaria laetevirens
(Lightf.) Zahlbr.
found in Iceland
by
Agúst H. Bjarnason
Laugateigur 39
105 Reykjavík
In mid-August 1971 I collected some sam-
ples of mosses and lichens in the Rangár-
vallasýsla county (Landmannaafréttur) in
southern Iceland. It was not until 1982 that
I got a chance to study the samples I had
collected in 1971. One of the samples was
a lichen I could not identify. It was sent to
Mr. Rolf Santesson in Uppsala, Sweden
who identified it as Lobaria laetevirens
(Lightf.) Zahlbr. (fig. 1). This lichen has
not been found in Iceland before. The
specimen I collected was from a small hil-
lock in the Lambafitjarhraun lava, which
was formed in an eruption north of the
volcano Hekla in 1913. The lichen was
collected from the lower half of the south
face of the hiliock, near the river Hellis-
kvísl.
136