L. Hably szerk.: Studia Botanica Hungarica 19. 1986 (Budapest, 1986)

Révay, Ágnes: Dematiaceous Hyphomycetes inhabiting forest debris in Hungary II.

America. It is the first record of B. obovatum from Hungary. - Collected on rotten wood of Fagus siivatica in the valley Sebesviz-völgy in the Bükk Mts, 8.10.1985. Bactrodesmium pallidum M.B.Ellis, Mycol. Pap. 72:11, 1959. (Pl.V. Fig.

3.) Sporodochia punctiform, dark brown, 200-300 jum in diam. Conidiophores fasciculate, subhyaline, 30-50 x 1.5-3>um. Conidia cylindrical, pale brown, 4-6-septate, 32-55 x 9.6-11.2 jam. - Collected on rotten wood, near Rejtek in the Bükk Mts., 10.10.1985. Bispora antennata (Pers.ex Pers.) Mason, Can.J.

Bot., 31:582, 1953. (Pl.I. Fig.

2.) Colonies effuse, black. Conidiophores 10-40 x 2-5 jum. Conidia dark or olive brown with a broad band at the septum, 17.6-22.4 x 6.4-8 jum. ELLIS (1971) gives somewhat smaller conidium size, 13-20(17) x 7-8(7.1)jum. It is not an uncommon species in Hungary. - Collected on rotten wood, Bányahegy in the Bükk Mts, 29.5.1985., near the stream Szén-patak, Börzsöny Mts.

} 6.9.1985. Brachysporium obovatum (Berk.) Saccardo, Syll.Fung. 4:427, 1886. (Pl.T. Fig.

4.) Colonies effuse, black. Conidiophores erect, simple, straight, dark brown, paler towards the apex, 180-300 x 4-6 jam. Conidia obovoid to pyriform, smooth, 2-septate, basal cell very small and subhyaline, central and terminal cells much larger and pale brown, 20-40 x 11-13 jam. This species is common in Europe on decaying wood, it was reported from Hungary by HOLUBOVÁ-JECHOVÁ (1979) and by VASS (1984). - Collected on rotten wood of Fagus siivatica

, near Rejtek in the Bükk Mts.

; 28.5.1985. Brachysporium nigrum (Link) Hughes, Can.J.

Bot. 36: 742, 1958. (Pl.

III. Fig.l.) This is a very common species on dead rotten wood of various deciduous trees in Hungary, both in frequency of occurrence and abundance. It was reported on two occasions from Hungary by HOLUBOVÁ-JECHOVÁ (1979) and RÉVAY (1985). There are minor differences in conidium size and colour between the present and the former collections. In the present collection the conidia are 19-24 x 12.8-14.6 jum. The two central cells are darker (almost black) and wider than they were in the former collections. ELLIS (1966) gives the size of conidia as 17-24(19.8) x 8-11(9.6) jam, HUGHES (1951) as (15)17-22(24) x (8)9-10(12) jam, HOLUBOVÁ-JECHOVÁ (1972) as (15)17-21(22.5) x (7)8-10(13) jum, RÉVAY (1985) as 17-19 x 8-10 jum. - Collected on rotten wood near Rejtek in the Bükk Mts

7 9.10.1985. Ceratocladium microspermum Corda, Pracht-Fl.: 41-42, 1839. Setae erect, dark brown, repeatedly branched at the apex, up to 250 urn long, stipe 4-4.5 jum thick. Conidiogeneous cells ampulliform, 6-10 x 3-4jum. Conidia cylindrical with rounded ends, hyaline, 3.8-6.8 x 0.5-1 jum. This species is known from Czechoslovakia, Germany and Great Britain. This is the first record of C. microspermum from Hungary. - Found on rotten wood of Fagus siivatica

, near the stream Szén-patak in the Börzsöny Mts., 6.9.1985. Cordana crassa Tóth. Annls.hist.-nat.

Mus.natn.hung. 67:32, 1975. (Pl.II. Figs.

1-24 This species of the genus Cordana was described by Tóth (1975) from bark of Fagus siivatica collected in Hungary. The occurrence of Cordana crassa on rotten wood of Alnus glutinosa was reported earlier (RÉVAY 1985). One of the collections cited below differs from the holotype in the presence of much longer conidiophores up to 500-600 jum and production of somewhat smaller conidia 17-24 x 11-14 jum. In the holotype the conidiophores are reported as up to 240 jum long and 6-7 jum thick. ELLIS (1976), in the description of Cordana boothii which represents the same fungus, gives the size of conidiophores as up to 300 jam long and 5-9 jum thick. - Collected on rotten wood, Odorhegy in the Bükk Mts. 10.10.1984., near the stream Garadna in the Bükk Mts.^ 29.5.1985. Diplocladiella scalaroides Arnaud ex M.B.Ellis, More demat.Hyphomyc. p. 229, 1975. (PI. II. Fig. 3.) Conidiophores 16-23 x 3-4 jum, simple, geniculate, pale brown. Conidia triangular, 2-horned, pale to mid-brown, 22-25 jum wide with up to 19 jum long hyaline appendages, basal cell 2-3.5 x 2-3 Aim. This species is well known from foam samples (INGOLD 1975, GÖNCZÖL fe TÓTH 1974), from dead wood (ELLIS 1976) and from fallen leaves (KIRK 1982, 1983, MATSUSHIMA 1980). During our observations on forest litter we found some conidia of this fungus in a washed litter sample collected from alder litter (GÖNCZÖL & RÉVAY 1983). It-was during the present collections that this species was found growing on its substrate for the first time in Hungary. - Collected on decaying cupules of Fagus siivatica

, in the valley Sebesviz-völgy in the Bükk Mts.

} 8.10.1985., on rotten wood and on cupules of Quercus cerris

, from tree-hollow near Bak in Zala County, 9.9.1984. Endophragmiella biseptata (Peck) Hughes, Fungi Canadenses No. 125. 1978. (Pl.V. Fig.

4.) Conidiophores erect, simple, dark brown, proliferated ones up to 420 jum long, 8.5-10.5 jum thick. Conidia predominantly 2-septate, rarely 1-septate, obovoid to ellipsoidal, at the base with a frill,