Seaver: Hypocreales of North America 



73 



I. Melanospora chionea (Fries) Corda, Ic. 

 Fung, i : 24. 1837 

 Cerato stoma chioneum Fries, Obs. Myc. 2 : 340. 18 18. 

 Sphaeria chionea Fries, Syst. Myc. 2 : 446. 1822. 



Perithecia gregarious or scattered, globose, clothed with a 

 dense covering of white hairs, with a light colored beak up to 

 1 mm. long and 100 mic. in diameter, clothed with a few hairs at 

 the apex; hairs which clothe the perithecia, 3 mic. in diameter, 

 septate, long and flexuose ; asci evanescent, obovate-clavate, stipi- 

 tate, 8-spored, 35-40 X 13-16 mic; spores 2-seriate or irregu- 

 larly crowded, globose-elliptical, brown, 10-12 X 9-10 mic. {pi. 

 4- /• P). 



On decaying pine leaves and more rarely on leaves of deciduous 

 trees. 



Type locality: Europe. 

 Distribution : Ontario. 



Illustrations : Fries, Obs. Myc. 2 : pi. 7. /. 2; Corda, Ic. Fung. 

 1 : pi. 7. /. ^97 B; Ellis & Everh. N. Am. Pyrenom. pi. 14. f. 1-5. 

 Winter, Rabenh. Krypt. Fl. i 2 : 85. /. 1-3. 



Specimens examined: Ontario, Dearness 1370. 



The American material of this species corresponds very closely 

 with European specimens examined except in the matter of habi- 

 tat. A specimen of the species from the herbarium of Fries is 

 contained in the collection of the New York Botanical Garden 

 but unfortunately it shows no perithecia, these having doubtless 

 been removed by those who have previously studied the speci- 

 men. Other European specimens have been studied with which 

 our material is identical. 



Doubtful Species 



Melanospora parasitica Tul. & Tul. Sel. Fung. Carp. 3 : 10. 

 1865. Sphaeronema parasitica Tul. Ann. Sci. Nat. IV. 8: 40. 

 (Note 2). Ceratostoma biparasiticum Ellis & Everh. Bull. Tor- 

 rey Club 24: 127. 1897. 



Perithecia scattered, enveloped in a growth of white, septate, 

 mycelial threads about 3 mic. thick, black, at least when mature, 

 ovate, 100-175 m i c - m diameter, with a long, slender, naked beak, 

 about 1 mm. in length and 30-40 mic. in diameter; asci clavate, 

 8-spored, 20 X 6 mic. ; spores elongated, cylindrical, with the 

 ends rounded, pale brownish, 6-7 X 2 mic. 



