60 



SPHAERIALES 



sets the Lophiostomaceae off distinctly from the other two families. This family 

 may constitute an intermediate stage in the evolution of the Hysteriaceae from 

 Sphaeriaceae, but the emphasis on the ostiole indicates that the carbonous genera 

 of hysterials have sprung directly from the sphaerials, as a response to the structure 

 of the matrix. The Verrucariacesc are lichens derived directly from Sphaeriaceae 

 as a consequence of becoming parasitic on blue-green or yellow-green algae and 

 developing a more or less conspicuous thallus. The fifth family is of problematic 

 constitution and position, as indicated later. 



Allantosporae 



1:88, 9:442, 11:271, 14:478, 16:417, 17:360, 22:67, 24:708, 775 



Hyalallantiae 



Spores 1-celled, botuliform, hyaline or subhyaline 



A. Perithecia separate or cespitose, without distinct 



subicle or stroma 



1. Perithecia innate, or finally erumpent 



a. Perithecia typically single or scattered 



(1) Perithecia beaked 



(2) Perithecia not beaked 



(a) Perithecia hairy 



(b) Perithecia glabrous 

 X. Perithecia discoid or cupulate 

 y. Perithecia globoid 



b. Perithecia cespitose or seriate 



(1) Perithecia in concentric groups between 



bark and wood 



(a) Perithecia hairy 



(b) Perithecia glabrous 

 X, Asci 8-spored 



(x) Perithecia beaked 

 (y) Perithecia not beaked 

 y. Asci many-spored 



(2) Perithecia merely cespitose, imbedded in 



bark or wood; stroma sometimes indi- 

 cated, as below 



(a) Perithecia imbedded in wood; asci 



8-spored 



(b) Perithecia imbedded in the bark 

 x. Asci 8-spored 

 y. Asci many-spored 



2. Perithecia superficial from the first 



a. Perithecia setose, ostiole central; asci 8-spored 



b. Perithecia glabrous, ostiole lateral; asci many- 



spored 



B. Perithecia on a subicle or in a stroma 

 1. Perithecia with a subicle or mycelial pseudo- 



stroma 



a. Perithecia setose 



(1) Asci 8-spored 



(2) Asci many-spored 



b. Perithecia glabrous, typically cupulate-col- 



lapsing 



Wegelina 16:421 



Enchnoa 1:89 



Romellia 16:419 

 Massalongiella 1 :89 



Coronophorella 



Calosphaeria 1:95. 16:419; 9 

 Togninia 1:101, 16:480 

 Coronophora 1:103 



Endoxyla 1:181 



Cryptosphaeria 1:182 

 Cryptosphaerella 1:185 



Euacanthe 



Pleurostoma 1 :95 



Acanthonitschkea 22:68 

 Neotrotteria 24:777 



