Part 1, 1910] HYPOCREACEAE 39 
DOUBTFUL SPECIES | 
Polystigma rubra (Pers.) DC. Fl. Fr. 6: 164. 1815. Xyloma rubra Pers. Syn, Fung. 
105. 1801. Sphaeria rubra Fries, Obs. Myc. 1: 172. 1815. This species has been reported 
from North America but its occurence is doubtful. 
7. BYSSONECTRIA P. Karst. Medd. Soc. Faun. Fl. 
Fenn. 6: 6. 1881. 
Perithecia seated in a scant, cottony stroma, subglobose or ovoid, vertically collapsing ; 
asci cylindric, 8-spored; spores 1-seriate, often overlapping, ellipsoid, simple_or occasionally 
pseudoseptate. 
Type species, Byssonectria abducens P. Karst. 
Stromata white ; perithecia violaceous. 1. B. violacea. 
Stromata yellow; perithecia yellowish-brown. 2. B. chrysocoma 
1. Byssonectria violacea (J. C. Schmidt) Seaver, 
Mycologia2: 65. 1910. 
Sphaeria violacea J. C. Schmidt; Fries, Syst. Myc. 2: 441. 1823. 
Hypomyces violaceus Tul, Ann. Sci. Nat. [V. 13: 14. 1860. 
Stromata consisting of a thin white mycelial growth overspreading the substratum ; 
perithecia thickly scattered, globose or subglobose, smooth or only minutely roughened, 
vertically collapsing, violaceous ; asci cylindric ; spores 1-seriate or with the ends slightly. 
overlapping, ellipsoid, simple, granular within, 6-7 X 2-3. 
On slime-nioulds (Fuligo). 
TYPE LOCALITY: Europe. 
DISTRIBUTION: Maine; also in Europe. 
2. Byssonectria chrysocoma Cooke & Hark.; Cooke, 
Grevillea 12: 101. 1884. 
Stromata effuse, byssoid, golden-yellow; perithecia minute, gregarious, obovoid, yel- 
lowish-brown, partially immersed in the stroma; asci clavate; spores 2-seriate, narrowly 
ellipsoid, simple or doubtfully septate, 10-13 & 3. 
On wood of Lucalyptus. 
TYPE LOCALITY: California, 
DISTRIBUTION: Known only from the type locality. 
DOUBTFUL SPECIES 
Byssonectria Fimeti (Cooke) Sacc. Syll. Fung. 2: 457. 1883. Nectria Fimeti Cooke, 
Grevillea 11: 108. 1883. The species was described from material collected by Raveriel. 
Cotype material has been examined by the writer and the only ascomycete found was a dis- 
comycete. Whether the ascocarps were mistaken for perithecia it is difficult to state. 
Byssonectria rosella Cooke & Hark.; Cooke, Grevillea 12: 101. 1884. Described from 
imperfect material. 
Hypomyces exiguus Pat. Bull. Soc, Myc. Fr. 18: 180. 1902. On the fructification of 
Stemonitis. According to the author of the species this is closely related to HY. violaceus 
Tul. No specimen has been seen. 
8. PECKIELLA Sacc. Syll. Fung. 9: 944. 1891. 
Hypomyces§ Peckiella Sacc. Syll. Fung. 2: 472, 1883. 
Stromata consisting of an effuse cottony subiculum, usually parasitic on other fungi ; 
perithecia immersed or partially immersed in the subiculum ; asci cylindric or clavate, 8- 
spored ; spores fusiform, simple, smooth or externally roughened. 
Type species, Sphaeria viridis Alb. & Schw. 
Stromata dirty-greenish. 1. P. viridis. 
Stromata not greenish. 
Spores comparatively small, 15-20 # long. 
Stromata lemon-yellow. : 2. P. Camphorat, 
Stromata white, Cecominw pallid or latericeous. 3. P. lateritia. 
