GRAPHIS ScnIPTA

Punctelia ulophylla new to Norway
YNGVAR GAUSLAA
Gauslaa, Y. 2000: Punctelia ulophylla new to Norway. Graphis Scripta 12:
12-14. Stockholm. ISSN 090t-7593.
Punctelia ulophylla is reported from Norway for the first time, based on one
new locality, and three herbarium specimens from 1970 named P.
subrudecta. Three localities are now known in southwestern Norway.
Yngvar Gauslaa, Department of Biologt and Nature Conservation, The
Agricultural University of Norway, P. O. Box 5014, N-l432 As, Norway.
The European sorediate Punctelia species
with lecanoric acid were recently revised (van
Herk & Aptroot 2000). Two closely related
species were recognized in western and central
Europe: Punctelia subrudecta (NVl.) Krog
and P. ulophylla (Ach.) van Herk & Aptroot.
They were found to occur sympatrically, often
together on one tree, differing in e.g. the
colour and pruinosity of the thallus margin
and location of soralia (van Herk & Aptroot
2000). While reading the description of P.
ulophylla, I recalled a Norwegian Punctelia
subrudecta specimen from a new locality in
Farsund, Vest-Agder in 1996. I was pu-zled
by its greenish colour and strikingly marginal
soralia in the field, but according to current
literature at that time, the specimen could be
nothing else but P. subrudecta. Having also a
pruinose margin, the examined material fits
well to the new description of P. ulophylla, as
was confirmed by Aptroot and van Herk.
Since P. ulophylla was recently recognised
as a separate species, the Norwegian P.
subrudecta collections in O (14 specimens),
BG (8 specimens) and NLH (2 specimens)
were checked. Three P. ulophylla specimens
from two different localities were found
among the studied specimens. The two specimens
from fuOat in Rogaland were collected
on Alnus glutinosa, during a lichenological
excursion in 1970 (Krog l97l) by Osthagen
and Hsiland; the third specimen (Nedstrand in
Rogaland) was collected on Acer pseudoplatanus
by R. Elven during the same excursion.
Typical P. subntdecta specimens were simultaneously
collected from both mentioned
localities by H. Krog (fudal) and H. Osthagen
(Nedstrand), and P. subntdecta was subsequently
published as new to Norway (Krog
l97l) with a description that fitted P.
subrudecta only.
As pointed out by van Herk & Aptroot
(2000), the two species are closely related,
and are separated by morphological characters
only. In Norway, they occur sympatrically in
two of the three known localities, as has been
observed in other parts of Europe (van Herk &
Aptroot 2000). Only two specimens have
distinctly pruinose margins; the two others
have pale margins. The morphological variation
of the Norwegian sympatric populations
should be studied in the field.
Ecology
The new P. ulophylla specimen from Kvile in
Farsund was found on a Quercu.s stem dominated
by parmelioid lichens, especially Parmelia
sulcata and P. sacatilis, but Hypotrachyna
revoluta, Parmotrema chinense and
Cetrelia olivetorum were also present. Flavoparmelia
caperata was observed in small
quantities in the surroundings. The Quercus-