30 NORTH AMERICAN FLORA [Vorume 3 
bodies 2-3 X 1p, among which are the true spores; spores subglobose, mostly 1-seriate, 
becoming about 3-septate and muriform, 5-8 « in diameter, surrounded by numerous spore- 
like bodies which appear like minute appendages. 
On bark of Fraxinus and Gledtisia. 
TYPE LOCALITY: Lincoln, Nebraska. 
DISTRIBUTION : Known only from the type locality. 
DOUBTFUL SPECIES 
Pleonectria fenestrata (Berk. & Curt.) Berl. & Vogl. in Sacc. Syll. Fung. Addit. 216. 
1886. Nectria fenestrata Berk & Curt.; Cooke, Grevillea 12: 81. 1884. 
21. THYRONECTROIDEA Seaver, Mycologia 1: 206. 1909. 
Perithecia cespitose in erumpent clusters asin Thyronectria ; asci clavate-cylindric, 
8-spored ; spores ellipsoid, many-septate, becoming muriform, at first hyaline, becoming 
dark-brown. 
Type species, 7hyronectria chrysogramma Ellis & Ev. 
1. Thyronectroidea chrysogramma (Ellis & Ev.) Seaver, 
Mycologia 1: 206. 1909. 
Thyronectria chrysogramma Ellis & Ev. Proc. Acad. Phila. 1890: 245. 1890. 
Mattirolia chrysogramma Sacc. Syll. Fung. 9: 993, 1891. 
Perithecia springing from below the epidermis in dense, cespitose clusters of 3-6 perithe- 
cia each; individual perithecia ovoid, 0.25-0.5 mm. in diameter, clothed with a greenish- 
yellow coat with the ostiolum bare and black; asci clavate-cylindric, 150-175 X 14-18 pz, 
8-spored ; spores 2-seriate, ellipsoid, mostly a little curved, 7-10-septate, with very faint, 
interrupted, longitudinal septa, at first hyaline, becoming quite dark-brown, 25-35 & 10-124; 
paraphyses abundant. 
On bark of Ulmus americana I,. 
TYPE LOCALITY: Manhattan, Kansas. 
DISTRIBUTION: Ontario and New York to Kansas. 
DOUBTFUL GENUS 
CHILONECTRIA Sacc. Michelia 1: 279. 1878. The genus is characterized by the many- 
spored asci. All of the North American species referred to this genus have been found to 
contain in the asci, in addition to the many minute so-called spores, 2-8 large true spores, 
which are 1-~many-septate. These species would therefore belong to Nectria or Scoleconectria 
according to the nature of the true spores. 
