50 Mycologia 



Stromata olivaceous, small, 1—2 mm. in 



diameter. 4. H. minima. 



Stromata bright colored, whitish or bright yellow. 



Stromata whitish. 5. H. chionea. 



Stromata bright yellow. 6. H. patella. 



Stromata effused, spreading irregularly, with no definite 

 outline. 

 Occurring on wood and bark. 



Stromata very dark olivaceous. 7. H. olivacea. 



Stromata bright lemon-yellow. 8. H. sulphurea. 



Occurring on fungi. 



Stroma bright colored. 



Stroma orange, on Tyromyces. 9. H. anrantiaca. 



Stroma lemon-yellow, often fading. 10. H.citrina. 



Stroma dull pallid or whitish. 



On Tyromyces and related plants. 11. H. pallida. 



Forming rings on cups of Cyathus. 12. H.latizonata. 



I. Hypocrea rufa (Pers.) Fries, Summa Veg. Scand. 383. 1849 



Sphaeria rufa Pers. Obs. Myc. i : 20. 1796. 



Stromata gregarious, subhemispherical to patellate, occasionally 

 confluent and more or less irregular but normally quite regular in 

 form, 2 mm. to i cm. in diameter (mostly 2-5 mm.), externally 

 brick-red, the margin in young specimens white, later becoming 

 brown and in old specimens often free, becoming darker with 

 age, surface of the stroma roughened by the necks of the peri- 

 thecia which protrude slightly; perithecia nearly globose, 175-200 

 mic. in diameter ; asci cylindrical, becoming i6-spored, 75-100 X 

 5 mic. (spore-bearing part 60-75 mic.) ; spores nearly globose, 

 hyaline with a central oil-drop {pi. 20, f. 6-8). 



On wood and bark of various kinds and occasionally on old 

 fungi. 



Type locality : Europe. 



Distribution : Maine to N. Dakota and S. Carolina. Prob- 

 ably occurs throughout N. America. 



Illustrations: Winter; Rabenh. Krypt. Fl. pi. Sg, f. j-j; 

 Lindau, E. & P. Nat. Pfl. /. 243, A-D. 



ExsiccATi : Ellis, N. Am. Fungi, 757; Ellis & Everh. N. Am. 

 Fungi, 1552; Ravenel, Fungi Car. Exsicc. 55. Other specimens 

 examined: Maine, Miss. White; N. Jersey, Ellis 608; New 

 York, Zabriskie; N. Dakota, Seaver; Ohio, Morgan pj6, g.jo. 



