1909. No. 9. FUNGI (MICROMYCETES) COLLECT. IN ARCT. NORTH AMERICA. 25 
Explanation of figures. 
Fig. 1. 1 ascus of Leptosphaeria caricinella Karst. on Carex misandra. 
2 2 asci of Mycosphaerella Tassiana (DE Not.) JoHaxs. on Poa cenisia. 
3 1 ascus of Pleospora Drabae Scuroet. on Draba nivalis. 
Fig. 4. 1 ascus of Pleospora deflectens Karst. on Poa cenisia. 
5 
6 
Fig. 5. Conidia of some undeterminable Coniofhecium on Potentilla emarginata. 
Fig. 1 ascus of Pyrenophora chrysospora (Nirsst.) Sacc. on Qxytropis campestris. 
Fig. 7. 2 asci of Didymella hyperborea (KARST.) Sacc. on Cassiope tetragona. 
Fig. 8. 1 ascus of Pleospora macrospora SCHROETER on Hierochloa pauciflora. 
Fig. 9. 1 ascus of Pleospora discors (Mont.) Ces. & Not. on Elymus mollis. 
Fig. 10. 4 asci of Lophodermium versicolor (WAuLB.) SCHROET. on Salix arctica. 
Fig. 11. A trug of Cassiope tetragona with peritheciis of Didymella hyperborea (K.) Sacc. 
Fig. 12. 2 sporidia of Leptosphaeria insignis Karst. on Dupontia Fisheri. 
Fig. 13. 5 sporidia of Diplodina arctica n. sp. on Alopecurus alpinus. 
Fig. 14. ro conidia of Gloeosporium Roaldii n. sp. on Polemonium boreale. 
Fig. 15. 12 conidia of Marssonina obscura (RoMELL) P. Maen. on Salix arctica. 
Fig. 16. 5 sporidia of Diplodina arctica n. sp. on Poa cenisia. 
The figures are drawn by Mr. Ove Rostrup and all magnified 540 X with exception 
of fig. 11. 
Printed April 25th 1910. 
