252 CLASS ASCOMYCETEAE 



Ascospores ellipsoid, one-celled, paraphyses not forming an epi- 



thecium. Phacidium 



Ascospores ellipsoid, one-celled, paraphyses forming an epithecium. 



Trochila 

 Ascospores thread- or needle-like, one- to many-celled. 



Cocconiyces 

 Several apothecia in each stroma, opening by elongated slits. 

 Ascospores ellipsoid. Pseudorhytisma 



Ascospores thread- or needle-like. Rhytisma 



Apothecia single in elongated stromata, opening by elongated slits. 

 Ascospores fusiform or rod-shaped, eventually two-celled. 



Hypoderma 

 Ascospores thread-like, one-celled. Lophodermium 

 Apothecia cartilaginous, leathery or fleshy, superficial or emerging from 

 the substratum; sessile or tapering to a central stipe-like base. 

 Stroma if present not dark and hard. Ascospores oblong to 

 needle-shaped, mostly hyaline. Parasites or saprophytes. 



Family Dermateaceae 



(including Mollisiaceae) 

 Apothecia long-lived, cartilaginous or leathery, narrowed at base and 

 formed on a leathery or cartilaginous stroma which breaks out 

 through the bark. Ascospores 8 in number, one-celled, later 

 more-celled. Dermatea (Dermea) 



Similar to Dermatea but the ascospores budding in the ascus into innu- 

 merable tiny spores. Tympanis 

 Apothecia soft fleshy, no stroma present. Asci small. Ascospores 8 per 

 ascus, ellipsoid, hyaline. Paraphyses slender, branching some- 

 what near the tips. Conidial stages Hainesia and Pilidium. 

 Parasitic on herbaceous tissues. 



Discohainesia 

 Apothecia long-lived, leathery or cartilaginous, not dark-colored, break- 

 ing out early from the host tissue. Asci large, ascospores 

 hyaline, simple or septate. Paraphyses thick, often cemented 

 together by their enlarged tips. Parasitic on woody tissues. 



Pezicula 

 Apothecia waxy or fleshy, breaking out of the host tissue or attached 

 only by the narrow base. Dark- or light-colored, often hairy 

 externally. Asci large. Ascospores hyaline one- to several-celled. 

 Saprophytes or parasites. 

 Apothecia superficial or attached by the narrow base, rolling together 

 when dry. Ascospores one- to two-celled. 



Mollisia 

 Apothecia immersed in the host tissues, breaking out at maturity. 

 Clothed with dark .septate hairs. Pirottaea 

 Apothecia hairless except the hyaline marginal hairs. On herbaceous 

 plants except grasses or grass-like species. 



Pyrenopeziza 

 Apothecia formed on the dead stems or leaves of the host plants, the 

 asexual stages actively parasitic. Exciple not strongly devel- 

 oped. 

 Apothecia depressed globose, conidial stage Cylindrosporium. 



'^ Higginsia" Nannf. 



