Seaver: The Genus Lasiosphaeria 



117 



Lasiosphaeria Ces. & De-Not. Comm. Soc. Critt. 

 Ital. 1 : 229. 1863 



Leptospora Fuckel, Symb. Myc. 143. 1869. ?Not Leptospora 

 Rabenh. 1857. 



Perithecia superficial, free or seated in a subiculum consisting 

 of a black or dark brown mycelial growth, cylindric, globose, 

 ovoid or pyriform, brownish or blackish or occasionally light 

 colored by reason of the pale hairs with which they are clothed, 

 or clothed with black hairs ; hairs rigid or flexuous, few or 

 abundant ; asci cylindric or clavate, usually 8-spored ; spores very 

 variable, usually vermiform with a delicate appendage at either 

 end, hyaline or colored a part of their length, or often with an 

 enlarged head which may be hyaline or dark brown in color, 

 simple at first but often becoming at maturity delicately septate; 

 septa variable in number or in some species constant. 



Type species, Sphaeria ovina. 



Spores uniformly hyaline or subhyaline throughout their 

 entire length. 



Perithecia clothed with light colored hairs giving them 

 a grayish or yellowish appearance. 

 Hairs scant, flexuous, varying from yellowish to 

 whitish. 



Hairs abundant, rigid, giving the perithecia a 

 spiny appearance. 

 Neck of the perithecia simple. 

 Neck of perithecia compound, four-parted. 

 Perithecia clothed with black hairs. 



Perithecia subglobose to pyriform. 



Hairs abundant, rigid, giving the perithecia 

 a spiny appearance. 

 Spores 50-80 X 6 fjL, becoming 7-septate. 

 Plants occurring on wood. 

 Plants occurring on soil. 

 Spores 65-70 X 3-4 /J., becoming many- 

 septate. 



Hairs scant, spores small, 20 X 4 fi. 

 Perithecia flat below, depressed-conic. 

 Spores dark brown a part of their length. 



Colored portion of spore enlarged into an ellipsoid 

 head. 



Colored portion of spore not enlarged. 



I. L. mucida. 



2. L. strigosa. 



3. L. stuppea. 



4. L. hispida. 



5. L. ierrestris. 



6. L. multiseptata. 



7. L. globularis. 



8. L. jamaicensis. 



9. L. newfieldiana. 

 10. L. dichrodspora. 



