Seaver: Hypocreales of North America 51 



Spores broad-elliptical. 

 Spores very slender, allantoic! (1-2 mic. 

 broad). 

 Spores 5X2 mic. 

 Spores 6-7 X 1.5-2 mic. 

 Naked and smooth or only minutely rough. 

 Spores large, 15-22 mic. long. 



Spores allantoid ; plants parasitic 



on lichens. 

 Spores fusoid or fusiform, nearly 

 straight ; plants saprophytic 

 Spores broad-fusoid, 7 or more 

 mic. broad. 

 On foliage of dead cedar ; 



spores 15 X 7 mic. 

 On bark; spores 18-22 

 X 7-10 mic. 

 Spores narrow-fusoid (4 mic. 

 broad) or fusiform. 

 Spores narrow-fusoid, 18- 



22 X 4-5 mic. 

 Spores fusiform, 18-22 

 X 5-6 mic. 

 Spores small, less than 14 mic. long 

 (mostly 7-10). 

 Perithecia sulphur-yellow-pruinose ; 



substratum yellow. 

 Perithecia not sulphur-yellow-prui- 

 nose. 



Perithecia pale, almost white, 



becoming subtruncate. 

 Perithecia orange, fading to 

 pale yellow, not truncate. 

 Perithecia deep red, ranging in color from scarlet 

 or blood-red to reddish-purple. 

 Perithecia with a few bristly hairs ; plants on 



herbaceous stems. 

 Perithecia naked (with no well-developed hairs). 

 Perithecia conical or subconical in form. 

 Spores large, 15-17 X 5-6 mic. 

 Spores small, 10-11 X 3-4 mic. 

 Perithecia ovate ; ostiolum very obtuse. 

 Spores narrow-fusoid ; on wood. 

 Spores broad-fusoid ; on sphaeriaceous 

 fungi. 



5. N. lactea. 



6. N. Rexiana. 



7. N. squamulosa. 



8. N. rubefaciens. 



9. N. thujana. 



10. N. disperse. 



11. N. Eucalypti. 



12. N. Apocyni. 



13. N. sulphurea. 



14. N. truncata. 



15. N. conigena. 



16. N. consors. 



17. N. Papilionacearum. 



18. N. Brassicae. 



19. N. sanguinea. 



20. N. episphaeria. 



