. Bulletin of the British Museum (Natural History) Botany. 282 D. L. HAWKSWORTH the conidial state of Pleospora herbarum (Fr.) Rabenh., a widespread parasite and saprophyte of vascular plants forming leaf-spots and occuring on decaying herbaceous stems, etc. This is conse- quently excluded as not an obligately or primarily lichenicolous fungus but one fortuitously occurring on Fig. 46 Monacrosporium carestianum. Reproduced from Ferraris (1904). Monacrosporium carestianum Ferraris, Malpighia 18 : 500 (1904). (Fig. 46) Type: Italy, Riva Valdobbia, on thallus of a Physcia, September 190
. Bulletin of the British Museum (Natural History) Botany. 282 D. L. HAWKSWORTH the conidial state of Pleospora herbarum (Fr.) Rabenh., a widespread parasite and saprophyte of vascular plants forming leaf-spots and occuring on decaying herbaceous stems, etc. This is conse- quently excluded as not an obligately or primarily lichenicolous fungus but one fortuitously occurring on Fig. 46 Monacrosporium carestianum. Reproduced from Ferraris (1904). Monacrosporium carestianum Ferraris, Malpighia 18 : 500 (1904). (Fig. 46) Type: Italy, Riva Valdobbia, on thallus of a Physcia, September 1901, A. Carestia 2121. Icones: Ferraris, Malpighia 18 : PI. 9 fig. 11 (1904).—Keissler, Rabenh. 8 : 601 fig. 122 (1930). No material of this taxon could be located in PAD (L. Curti, in litt.), RO (Q. Bartoli Rambelli, in litt.), VER (F. Bianchini, in litt.), or TOR (G. Forneris, in litt.). This fungus was described as producing long conidiophores to about 100 urn tall and 5 urn wide at the base, which were hyaline singly but pale rose in mass. The conidia were 1-3 septate, slightly constricted at the septa, broadly fusiform, rose in mass, and 21-26x7-8 urn. The striking resemblance between the description of this fungus and that of Dactylium dendroides subsp. lichenicola has already been mentioned under the latter above. Monacrosporium Oud. mainly comprises nematophagous fungi and it seems most unlikely that this species should be placed there. An assessment of the position of this fungus must await either the location of the type material or the re-discovery of a species agreeing closely with the original description so that the method of conidiogenesis can be established. Oidiodendron rhodogenum Robak, Nyt Mag. Naturvid. 71 : 251 (1932). Smith (1946 : 232) reported this species as new to the British Isles on the basis of a culture 'Ag 109' which was 'isolated by the late J. H. V. Charles from a lichen on a wooden post, in. Please note that these images are extracte
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