HUMARINA 123 



Apothecia short-stipitate. 12. //. araneosa. 

 Apothecia yellow to pale- 

 orange. 

 Apothecia sessile, partially 



immersed. 13. H. semiimmersa. 



Apothecia short-stipitate, 



superficial. 14. H. ochroleuca. 



Spores narrow-ellipsoid, contain- 

 ing two oil-drops. 15. H. rufa. 

 Occurring on decaying plant remains. 



Spores minute, 3 X 6-7 fi, on Carex. 16. H. wlsconsinensis. 

 Spores medium-sized, 12-20 m long. 

 Apothecia 1 mm. or less in diam- 

 eter. 

 On brassicaceous plants. 17. //. nectrioides. 



On unknown herbaceous 



plants. 18. //. deligala. 



Apothecia 1 to several mm. in di- 

 ameter. 

 Spores 10-11 X 20 m; on chaff. 19. //. glumarum. 

 Spores 8 X 12 ^i; on damp hay. 20. //. Peckii. 

 Spores 12 X 18-20 ai; on 



leaves. 21. //. phyUogena. 



Spores fusoid, approximately three times as long 

 as broad. 

 Asci 4-spored. 22. H. tetraspora. 



Asci 8-spored. 



Apothecia with a rose-colored hymenium. 23. II. pennuda. 

 Apothecia with an orange hymenium. 



Apothecia reaching a diameter of 5-8 



mm. 24. H. ollaris. 



Apothecia not exceeding 2-3 mm. in di- 

 ameter. 

 Spores 22-25 m long; on burned areas. 25. H. aggregata. 

 Spores 25-35 ;u long. 



Occurring on soil, but not on 

 burned areas. 

 Spores almost fusiform. 26. //. fiisispora. 



Spores fusoid, but with ends 



blunt. 27. //. coccinea. 



Occurring on dead sticks. 28. H. Cookeina. 



Apothecia violaceous. 29. //. Cerardi. 



Apothecia dark-colored, brown, brownish-black or 

 more rarely purplish. 

 Spores becoming rough; apothecia purplish. 30. II. purpurea. 



Spores remaining permanently smooth. 



Apothecia liver-colored. 31. H. hepatica. 



Apothecia dark but not liver-colored. 32. H. Irachyderma. 



