6 J. LIND. M.-N. KI. 
Mycosphaerella pachyasca (Rostrur) Var. (00). Syn.: Sphaerella 
pach. Rostr. (88). Sphaer. nivalis Fuck. (72) non Oups. (85). Didymo- 
sphaeria nivalis (Fuck.) BERL. & Vocr. Sacc. IX, pag. 613. Icon: Fuck. (72). 
The perithecia, which I have measured, varied from 120 to 160 u 
in diameter. The length of asci was 40—50—54—76—80 u and width 
12—18—22—23—24 u. The size of the spores varied too, the length 
was 16—20—24—28 u and the width from 4 to 7 u. Nevertheless I do 
not doubt, it is the same species in every case. A characteristic for the 
species is the thick wall of the asci and the extraordinary clear and 
colourless spores. This latter characteristic is the more notable, as in this 
regions the spores of the most part of the Pyrenomycetes are very dark 
coloured. 
On dead leaves and stems of Alsime verna f. rubella July 04, 
Astragalus alpinus *|s 05, Chrysanthemum integrifolium >| 
s 05, Cochlearia 
officinalis var. groenlandica °/; 04, Epilobium latifolium %/; 05, Eutrema 
Edwardsii ?/; 05, Papaver radicatum f. albiflora 1/5 05, Parrya arctica 
177 04 & 4/5 05. Pedicularis sudetica var. lanata Juli 04, Saxifraga cernua 
3% 04, Saxifr. hirculus var. propinqua Vs 04, Saxifr. rivularis */s 05, 
Stellaria longipes f. humilis "ls 05 and Taraxacum hyperboreum July 04. 
Area: N. (Dovre & Tromsø), Su., Spitsb., Isl., Gr., Els., Al. 
Mycosphaerella Polygonum (Cri) Lip. Sacc. I, p. 512. 
Peritheciis subcutaneis, atris, in foliis gregariis vel sparsis, in caulibus 
in series elongatas dispositis. Perit. 200 u diam., asc. 50—70 u X 16— 
20 tl) Sp. 17—20 u X 6 u, I sept. 
On dead leaves and stems of Oxyria digyna 5/4 04. 
Area: Isl., Gr., Els. besides Gall. 
Mycosphaerella Tassiana (ve Nor.) Jonas. (85). Syn.: Sphaeria 
arctica Fuck. (72), Didymella arctica (Fuck.) Bert. & Vocr. Sacc. I, pag. 
530. Icon: pr Nor. (63). Tab. XCVII, Fuck. (72). Tab. I, fig. 600003 
(8517 Tab. I, tee: 
Perith. 200 u diam. Asc. 40—44—47—52 u X 16—18—19—22— 
23 u, Sp. 14—20—22 u X 4,8—6 u. I do not see the necessity of 
separating this species from Mycosphaerella pachyasca. 
On dead leaves and stems of Alopecurus alpinus */s 05, Carex incurva 
& misandra *|s 05, Car. salina var. subspathacea ®/; 04, Eriophorum 
Scheuchzü ®/, 04, Glyceria maritima f. reptans 1]; 05 & ®/, 04, Glyc. 
Vahliana 3; 04, Poa cenisia ?/3 04 (look fig. 2). 
å Area: Nov. Seml., Finl., Su., N., Spitsb., Fær., Isl., Grønl., Labrador 
besides Germ., Tir., It. 
