Seaver: The Hypocreales of North America 205 



3. Thyronectria missouriensis (Ellis & Everh.) 

 Nectria missouriensis Ellis & Everh. Jour. Myc. 4: 57. 1888. 

 Pleonectria missouriensis Sacc. Syll. Fung. 9: 990. 1891. 

 Paronectria missouriensis Rabenhorst-Winter, Fungi Europaei, 

 3748. 1891. 



Perithecia cespitose on the stroma in clusters of 6-20, dull red, 

 nearly globose, smooth or minutely rough, with a prominent 

 ostiolum, usually not collapsing, 250-300 mic. in diameter; asci 

 clavate, 100-120 X 12-15 mic, 8-spored; spores crowded irregu- 

 larly in the ascus, large, elliptical, straight or a little curved, 

 hyaline or very slightly yellowish, 6-7-septate, with several longi- 

 tudinal septa, dividing the spore into numerous small cells, 20-30 

 X 10-12 mic. 



On bark of Carya. 



Type locality: Concordia, Missouri. 



Distribution : Delaware to Missouri. 



Specimens examined: Missouri, Demetrio 2/6. 



Distinguished from T. berolinensis (Sacc.) Seaver by the 

 larger size of the spores as well as by the difference in host and 

 a slight variation in perithecial characters. 



4< Thyronectria berolinensis (Sacc.) 

 Nectria Ribis Niessl, Verh. Nat. Ver. Brumm 2 : 114 (homonym). 



1865. 



Pleonectria berolinensis Sacc. Michelia 1 : 123. 1878. 

 Pleonectria Ribis Karst. Medd. Soc. Fauna Fl. Fenn. 5 : 42. 

 1879. 



Perithecia erumpent in large cespitose clusters 1-3 mm. in di- 

 ameter on a stroma which becomes indistinct in aged specimens ; 

 individual perithecia dull brick-red becoming darker with age 

 and often quite black, smooth or nearly so, entirely collapsing 

 becoming pezizoid with age, 250-300 mic. in diameter ; asci cylin- 

 drical-clavate, 8-spored; spores i-seriate, elliptical, 5-9-septate 

 and muriform, hyaline or very slightly yellowish, 16-20 X 7~8 

 mic. 



On dead branches of Ribes (wild and cultivated). 



Type locality: Germany. 



Distribution : Massachusetts to Montana. 



Illustrations : Ellis & Everh. N. Am. Pyrenom. pi. 12, f. 7-8. 



Exsiccati: Ellis, N. Am. Fungi, 470; Ellis & Everh. Fungi 



