Fróðskaparrit - 01.01.1996, Síða 77

SPECIES ON THE ALGAL GENUS VAUCHERIA ON THE FAROES
81
Eysturoy
1.29 E 606.5 N 6912.4. In a narrow, shaded channel
leading water from a brooklet down to the steam that
runs through the village of Gjógv.
2. 29 E 606.7 N 6912.5. On the shaded, drizzling verti-
cal side of the gorge at Gjógv.
Streymoy
3. 29 E 607.4 N 6887.1. On the side of the smaller
stream of the two flowing into the head of Kol-
lafjørður.
4. 29 E 607.5 N 6887.1. In the salt marsh at the head of
Kollafjørður.
5. 29 E 609.1 N 6883.4. In ditches in grassland at the
head of Kaldbaksfjørður.
6. 29 E 613.5 N 6882.9. On the dry bottom of a road-
side ditch in Kaldbak.
7. 29 E 613.7 N 6882.9. On the side of a brooklet in
Kaldbak.
8. 29 E 613.7 N 6883.1. In a roadside ditch in Kaldbak.
Suðuroy
9. 29 E 608.0 N 6832.1. On the steep side of a brook in
Hvalba.
10. 29 E 608.8 N 6831.5. On moist sand along a brook-
let in Hvalba.
11.29 E 609.4 N 6830.5. On a low cliff between the
grassland and the sheltered bay inside the barrier
southwestof Nes.
12.29 E 614.4 N 6827.2. On the side of the stream
Stórá at Trongisvágur.
13,14 and 15. 29 E 614.7 and 614.8 N 6827.2 and
6827.4. In the salt marsh at Trongisvágur.
Viðoy
16. 29 E 628.6 N 6916.4. On concrete irrigated by wa-
ter from a brooklet at the head of Eiðsvík.
Results and discussion
The following species of Vaucheria are rep-
resented in the material:
Vaucheria aversa Hassall 1843 has been
found in the samples 3 and 4.
V. canalicularis (L. 1753) T.A. Chr. 1968
occurred in sample 10.
V. coronata Nordst. 1879 constitutes
sample 11. The same species has been re-
corded by Børgesen (1901) from Miðvág-
ur, Vágar, UTM about 29 E 595 N 6881 and
by Irvine (1982) from near Hvalvík, Strey-
moy, about UTM 29 E 603 N 6897.
V. dillwynii (Weber & Mohr 1803) C. Ag.
1812 was recorded from the Faroe Islands
by Lyngbye (1819). Børgesen (1899), de-
scribing material from Iceland, took up the
later name V. pachyderma Walz 1866 find-
ing identity between the two species uncer-
tain. His Icelandic alga had larger oospores
than that described by Walz and also dif-
fered somewhat as to the shape of the an-
theridium, so he established a separate var.
islandica for it, and this has later been ele-
vated to the rank of species by Cedergren
(1933). The identity between V. dillwynii
and V. pachyderma was confirmed eight
years later, cf. Christensen (1973), so that
V. pachyderma must now be regarded as a
later synonym of V. dillwynii. In recording
the species from the Faroe Islands Børge-
sen stated (Børgesen, 1901) that the
oospores in this material were smaller than
in V. pachyderma var. islandica, but he did
not compare with typical pachyderma. In