ARKIV I"ÜR BOTANIK. BAND (i. N:o 1 



Taf. 2. 



O. Borge ad nat. del. Ljustryck J . Cederquist, Sthlm, 



13. Euastrum humcrosum f. scrobiculata ; 14. E. ainpullaceum f. scrobiculata; 

 15. E. dcnticulatum; 16. Cosmarium polymorphum*paulense; 17. C. anisochon- 

 drum; 18. C. decussiferum ; 19. C. regncsi v. montanum; 20. C. subpalangula f. 



dcpauperata; 21. C. Cordanum; 22. C. pscudopyramidatiini; 23-24. C. granatum; 

 25. C. tetrachondrum ; 26. C. pseudoprotubcrans; 27. C. bicuncatum v. tatricum; 

 28. C. polonicum v. alpinum; 29. C.polon. v. quadrinodosum; 30. C. subreniforme. 



