L. Hably szerk.: Studia Botanica Hungarica 18. 1985 (Budapest, 1985)

Révay, Ágnes: Dematiaceous Hyphomycetes inhabiting forest debris in Hungary I

(HUGHES 1978). - Found on dead twigs of Alnus glutinosa, near the stream Morgó-patak, Börzsöny Mts, 9.2.1984. Exosporium tiliae Link ex Schlecht. Colonies discrete, dark brown. Stromata erumpent, 200500 Aim diam. Conidiophores dark brown, 40-120 x 10-12 jum. Conidia straight or curved, obclavate, dark brown, 5-10 (15)-pseudoseptate, 80-150 x 10-16 jum. Not a common species in Hungary. Found on branches of Tilia cordata

, Gálhegy, Börzsöny Mts, 2.6.1981., 1.7.1981., 9.10.1981. Gonytrichum caesium Nees ex Pers. Perfect state: Melanopsammella inaequalis (Grove) Höhnel Colonies grey, later becoming blackish brown, Conidiophores 300-450 x 2-3 jum, dark brown, branched, branches anastomosing. Conidia ellipsoidal, hyaline, 2-3 x 1-1.5 urn. This is a fairly common species on dead wood. - Found on dead wood, Morgó-hegy, Börzsöny Mts, 14.9.1984.; Odor-hegy, Bükk Mts, 10.10.1984. Graphium calicioides (Fr.) Cooke et Massee (Pl.

III. Fig.

4.). Synnemata black, up to 1.5-2 mm long and 100 jum wide, individual threads 1.5-2 jum thick, pale brown. Conidia ellipsoidal or obovoid, pale brown, 2.5-3 x 1.5jum. It is common on rotten wood. - Found on dead wood, Királyrét, near the stream Nagy-Vasfazék-patak, Börzsöny Mts, 9.9.1981. Helicosporium vegetum C.G.Nees. Perfect state: Tubeufia cerea (Berk et Curt.) Booth Colonies hairy, greenish yellow. Conidiophores dark brown, unbranched, 180-250 x 3-4 jum. Conidia hyaline, 12-20 Aim diam., helically coiled 2-3 times in one plane. This is a common fungus on various forest debris lying on the ground. - Found on dead branch of Quercus sp.

, near the stream Morgó-patak, Börzsöny Mts, 9.2.1984., 9.3.1984. Helminthosporium velutinum Link. Conidiophores dark brown, up to 900-1000 jum long, 15-20 Aim wide. Conidia straight or flexuous, obclavate, pale brown or subhyaline, 5-15-pseudoseptate, 40-100 x 14-18 Aim. Only few data are known of this fungus in Hungary, but it is not uncommon in Europe. - Found on dead branches of Quercus sp

., Gálhegy, Börzsöny Mts, 7.9.1981.; on dead branches of Robinia pseudacacia, Kelemen-hegy, Börzsöny Mts, 8.9.1981. Menispora caesia Preuss. Perfect state: Chaetosphaeria pulviscula (Curr.) Booth. Colonies grey or brown, velvety. Setae straight, unbranched, brown, 300-500 x 3-5 Aim. Conidiophores brown, branched, 200-300 x 2.5-4 jum. Conidia curved, hyaline, cylindrical or fusiform, 13-20 x 3- 4 Aim. Not uncommon on rotten wood. - On dead wood, Verőcemaros, Börzsöny Mts., 15.6.1984.; Odor-hegy, Bükk Mts, 11.10.1984. Neta patuxentica Shearer et Crane. Colonies discrete, about 0.5 mm diam., consisting of a loose, black net with whitish spore mass in its centre. Conidia hyaline, 1-septate, curved, 13-15 x 4- 5 Aim. This fungus was first reported in Hungary on dung (TOTH 1975b). Later it has been found several times on moderately decayed leaves (

Quercus spp

.) (GÖNC ZÖL&RÉVAY 1983). On one occasion it was found on dead wood. - On dead wood, Morgó-hegy, Börzsöny Mts, 9.3.1984. Paradendryphiopsis cambrensis M.B.Ellis (Pl.III. Fig. 3.). Conidiophores 130-300 x 6.4-8 Aim, brown, branched towards the apex. Conidia catenate, 3-septate, the two middle cells brown, and two outer subhyaline or pale brown, 30-40 x 9-12 jum. This fungus had not been found previously in Hungary. - Found on dead branches of Quercus sp

., Morgó-hegy, Börzsöny Mts,5.4.1984. Periconia cookei Mason et M.B.Ellis. Conidiophores dark brown, 400-500 x 14-24 Aim.Conidia globose, verrucose, brown, 14-16 jam diam. Very common on dead herbaceous stems and on decaying wood. - Found on dead twigs of Corylus avellana

, Kelemen-hegy near Kóspallag, Börzsöny Mts, 2.6.1981.; on dead stems of Urtica dioica

. Verőcemaros, Börzsöny Mts, 8.4.1981. ,7.9.1981. Phaeoisaria clavulata (Grove) Mason et Hughes. Synnemata 250-420 x 12-18jum, individual threads 1.2-1.5jum thick. Conidia 1-2 jum diam., globose or ovoid. Uncommon in Hungary.-Found on dead wood, Morgó-hegy, Börzsöny Mts, 5.4.1984. Pleurophragmium acutum (Grove) M.B.Ellis. Conidiophores solitary or in groups, straight or flexuous, branched, 25-50 x 2-3 jum. Conidia fusiform, nonseptate, 7-8 x 2-2.5/im, hyaline. This is an uncommon species in Hungary. - Found on dead wood, Morgó-hegy, Börzsöny Mts, 9.2.1984. Pleurotheciopsis bramleyi Sutton. Conidiophores 200-300 x 5-6.5 jum, straight or somewhat flexuous, dark brown, paler towards the apex. Conidiogenous cell polyblastic, usually with conspicuous cylindrical flat-topped denticles. Conidia 18-25 x 4-6jum, hyaline, catenate, truncated at both ends, 3-septate, sometimes the two inner cells of the conidia conspicuously thick-walled and pale brown. Our observations show that this fungus appears fairly frequently on small twigs in wet conditions. This fungus had hitherto been unknown from Hungary, - Found on dead twigs, near the stream Morgó-patak, Börzsöny Mts, 9.3.1984., 5.4.1984., 14.9.1984.; near the stream Oldalvölgyi-patak, Bükk Mts, 29.5.1984.; Zala County near Bak, 20.6.1983. Pleurothecium recurvatum (Morgan) Höhnel (Pl.

III. Fig. 1.). Conidiophores singly, dark brown, subhyaline at the apex, 200-300 x 4-5 Aim, 6-8 jum at the base. Conidia borne upon blunt teeth, and