Macro stilbum Pat., Bull. Soc. Mycol. France 14: 197. 1898. Type species (only original species): Macro stilbum radicosum Pat. Notes: Clements and Shear (1931) treat the genus as belonging to the Deuteromycetes. Killermann (1928) considered it an Auriculariaceae. Donk (1958) did not treat it, considering it non-basidiomycetous. Monochaetopsis Pat. in Pitard, Contrib. fl. Maroc p. 74. 1931. Type species (only original species): Monochaetopsis antir- rhini Pat. in Pitard. Notes: This genus has never been studied. Kendrick and Carmichael (1973) list it only as having been seen in Ainsworth (1971). Ovulariopsis Pat. & Har., J. Bot. (Morot) 14: 255. 1900. Type species (only original species): Ovulariopsis eristi- phoides Pat. & Har. Notes: Considered by many workers to be the imperfect stage of Phyllactinia. Placosphaerella Pat., Pl. Cell. Tunisie p. 121. 1897. Type species (only original species): Placosphaerella tragacan thae Pat. Notes: There are at least two possible interpretations which can be made of the genus Placosphaerella. These alternatives are provided by certain ambiguities in interpretations of Article 10 of the International Code of Botanical Nomenclature. When Patouillard described Placosphaerella he included it in the Deuteromycetes. He wrote "Cette plante a les caractères d'un Ascochyta dont les peritheces seraient réunis par un stroma ou d'un Placosphaeria à spores didymes." The only species described and included was P. tragacanthae (Lev.) Pat. Petrak (1951) studied the specimen in Patouillard's herbarium which was identified by Patouillard as Dothidea tragacanthae Lev. He found it to be composed of the stroma of an Omphalospora, a peritheci um of a Pleospora, and a Diplodina sp. On the grounds that this was a mixed specimen, composed of several unrelated elements, he rejected the genus. Had Patouillard described this specimen as a new species rather than identifying his specimen as Léveillé's species, Petrak's conclusions would have been unquestionably correct. In many people's minds a questions remains as to what, in practice, is the type of a genus. Is the delimitation and concept of a genus to be based upon a concept of the type specimen of the type species or upon a concept of the material which was before the describing author? Different opinions about the genus Placo- sphaerella are derived depending upon which of these views is followed. Dothidea tragacanthae is now considered by most authors to