The Botany of Iceland - 01.12.1949, Qupperneq 20

EMIL HADAC
Kleifarvatn, 160 m; Súlur, 140 m; Hagafell, 120 m; Snókafell, 125 m; Cape
Reykjanes, 65 m; Grindavík, 5—70 m; Almenningur, 80 m; Háaleiti, 55 m;
Jr’orbjöm, 40 m; Merkines, 10 m; Fóelluvötn, 180 m; Vífilsfell, 200 m; Hvamma-
hraun, 140 m; Stapatindar, 210 m; Vigðísarvellir, 205 m; Grímsholl, 58 m.
Iso'étaceae.
12. Isoétes lacustris L. Sp. pl. (1753) 1100.
135—220 m.
In lakes in the depth of about 1 m. New for the area investigated. Fertile
abundantly.
In small lakes in the Krísuvíkurdalur; a “maar” near Stóra Nýibær, Geststaða-
vatn, in a pool near Grænavatn at Krísuvík; a “maar” to the west of Hattur
in Sveifluháls ridge; Minnsta Grænavatn in the Vesturháls ridgeA)
Ophioglossaceae.
13. Botrychium ianceolatum (Gmel.) Ángström, Bot. Not. (1854) 68.
450 m.
Highland plant, in one placc only: northern part of the mountain ridge
Brennisteinsfjöll, on the hillside of the Western Plateau, 450 m. New for the
area investigated. The nearest locality is on Hengill.
14. Botrychium Lunaria (L.) Sw. (1800) 110.
2—290 m.
Lowland plant, frequent, especially in the heath communities. Fertile in July.
Keflavík, Hafnarfjörður (Fru Knudtzon 1873), Njarðvíkurhraun, 42 m;
Krísuvík, 135 m; Herdísarvík, 2—180 m; Logberg, 120 m; Djúpavatn, 290 m.
15. Ophioglossum vulgatum L. Sp. pl. (1753) 1062. var. islandicum
Löve & Löve.
In the area investigated in one locality only, at hot springs. Gunna on Cape
Reykjanes (Thoroddsen). On the cited locality still frequent.
Polypodiaceae.
16. Athyrium Filix-femina (L.) Roth (1799) 106.
10—120 m.
In lava fissures, not common.
Hafnarfjörður (Solander), Kapelluhraun (Thoroddsen), between Helgafell and
*) In the mountain ridge of Vesturháls is situated a group of tree lakes. One of
them may be seen on the Special Map of the Danish General Staff under the name
“Grænavatn”. The other two lakes are missing on this map, as well as on other ones.
We call the largest of these lakes (the southernmost one) Stóra Grænavatn, the
second largest one (called on the map Grænavatn) Lítla Grænavatn, and the smallest
one Minnsta Grænavatn; this last one is situated to the West of Lítla Grænevatn.
In my paper “Plantae faeroenses ac islandicae” 1937 I have used for the same
locality the name “Minnsta Vestur Grænavatn”. Ingimar Óskarsson in “Nýjungar
1937” has used for the same lake the name Lítla Grænavatn.