Plate 121 



Figs. 1-3. Nostoc paludosum Kuetzing, x 750 (3, redrawn after 

 Janczewski, ex Fremy ) 



Figs. 4, 5. Nostoc ptmctiforme (Kuetz.) Hariot: 4, x 280; 5, x 

 900 ( redrawn from Fremy ) 



Figs. 6-9. Nostoc sphaericum Vaucher: 6 and 9, x 900; 7 and 8, 

 habit, X % 



Fig. 10. Nostoc spongiaeforme C. A. Agardh, x 900 



Figs. 11-13. Nostoc vernicosum Vaucher: 11 and 12, habit, x %; 

 13, X 900 



[902] 



