192 



PHOMALES 



(a) Basidia present; pycnidia more or less 



fimbriate at margin 



(b) Basidia none 



B. Pycnidia with a subicle 



C. Pycnidia with a stroma 



1. Stroma innate, striiform; basidia lageniform 



2. Stroma superficial 



a. Basidia present 



b. Basidia none 



Actinothyrium 3:658, H 546; 51 



Stigmopeltis 



Thyrinula 



Placothyrium 



Trachythyriolum 

 Ischnostroma H 218 



Family 83. DISCELLACEAE 



(Excipulaceae) 



Pycnidia often globoid at first, then becoming scutellate or discoid, or elongate, 

 hysterioid, boat-shaped, membranous to carbonous or fleshy to gelatinous, dark or 

 bright-colored, innate, erumpent or superficial; conidia and basidia various. 



The genera with bright-colored fleshy pycnidia are distinguished from those of 

 the Zythiaceae by the scutellate or discoid form, while the hysterioid ones open 

 widely and lack the radiate scutellum of the Leptostromaceae. 



Subfamily Discellae 



Pycnidia dark, membranous to carbonous, rarely fleshy 



Hyalosporae 



3:665, 10:432, 11:558, 14:999, 16:993, 18:436, 22:1166 

 Conidia 1-celled, hyaline, globose to oblong 



A. Pycnidia innate or erumpent 



1. Pycnidia patelloid, at least finally so 



a. Conidia catenate 



(1) Basidia present; chains of conidia simple Sirexcipula 22:1171, H 255 



(2) Basidia obsolete; chains often ramose 



b. Conidia not catenate 



(1) Conidia strongly falcate 



(2) Conidia not falcate 



(a) Pycnidia globoid, dehiscing irregularly 



to become cupuloid 



(b) Pycnidia cupulate or scutellate-discoid 



2. Pycnidia hysterioid or laciniate 



a. Pycnidia hysterioid 



(1) Conidia catenate 



(2) Conidia not catenate 



b. Pycnidia laciniate 



B. Pycnidia superficial 

 1. Pycnidia setose or hairy 



a. Conidia ciliate 



(1) Conidia 1-ciliate at each end 



(2) Conidia x-ciliate at apex 



(3) Conidia cruciate-aristate 



b. Conidia not ciliate 



(1) Basidia present 



(2) Basidia none 



Desmopatella 

 Neopatella 22:1166, H 121 



Traversoa 

 Stictopatella 



Lophodermopsis 22:1159, H 120 

 Psilospora 3:679, H 331; 51 

 Sporonema 3:677, H 250 



Dinemasporium 3:683, H 177; 



51 

 Polynema 3:687, H 176 

 Stauronema 



Amerosporium 3:680, H 170 

 Xenopeltis 



