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

Gönczöl, János: Forest litter Hyphomycetes from Hungary

the observations made in the previous years, this time Camposporium pellucidum Grove and Var- gamyces aquaticus (Dudka) Tóth were also the commonest species sporulating profusely in almost all litter samples. Camposporium japonicum Ichinoe was also found to be fairly frequent. Neta pa- tuxentica Shearer et Crane and Mirandina corticola Arnaud were reported from litter leaves, these species have in the present observations been found on woody-litter (decaying twigs). A fungus mentioned as Tricladium sp. under No. 30 is undoubtedly identical with Tricladium castaneicola Sutton. During the further observations this fungus has once again been found in a litter sample. Under No. 32, an unidentified fungus having a rather interesting conidium, was reported and a new genus, Hydrometrospora Gönczöl et Révay was described for it (GÖNCZÖL & RÉVAY 1984). Further species of forest litter Hyphomycetes are present in Hungary as follows: Chalara aurea (Cda.) Hughes (Pl.I, Fig. 2). T.G.NAG RAJ & B.KENDRICK: A monograph of Chalara and allied genera, p.

87. 1975. On the veins of leaf skeleton of Carpinus betulus. collected on the bank of Morgó-stream, near Verőcemaros in Börzsöny Mts, 10.10.1983. Conidiophores (phialophores) growing profusely on leaf-veins, simple, erect, straight or variously bent, cylindrical, one to five septate, without constrictions at the septa, pale brown to reddish brown, usually paler towards the apex, walls smooth, 65-80 jum long, 5-6 jum wide at the base. Venter cylindrical 2735 Aim long, 5-6 jum wide; collarette cylindrical, 30-40 jum long, 2.5-3.2 jam wide, transition from venter to collarette gradual, Phialoconidia cylindrical, truncated at the both ends, hyaline, smoothwalled, 10-14 x 2-2.5 Aim, 1 obscurely septate, forming chains on the tip of the phialophores.This fungus is identified with Chalara aurea with certain reservations since only some phialophores arise from stromatic layer of cells. Another difference is that the venter is cylindrical, not ellipsoidal. Chalara fusidioides (Cda.) Rabenh. (Pl.I, Fig. 1). T.G.NAG RAJ & B.KENDRICK: A monograph of Chalara and allied genera, p.

119. 1975. Found on the same leaf-skeleton from which Chalara aurea was reported, Morgó-stream, Börzsöny Mts, 10.10.1983. Phialides in dense clusters on leaf-veins, bearing directly or on very short 1-septate phialophores, pale to mid-brown, smoothwalled, 15-25Aim long, venter ellipsoidal or subglobose-globose, 7-10 x 5-8 jum, collarette cylindrical, 10-15Aim long, 2-2.5 Aim wide, transition from venter to collarette mostly abrupt. Phialoconidia singly or in chains, unicellular, hyaline, smooth-walled, with truncated ends, 6-8 x 2-2.5 Aim. Chaetopsis grisea (Ehrenb. ex Pers.) Sacc. (Pl.II, Figs 1-2). M.B.ELLIS: Dematiaceous Hyphomycetes, p. 564. 1971. Found on debris of alder litter, on the bank of Morgó-stream, near Verőcemaros in the Börzsöny Mts, 10.11.1983. Colonies on a small piece of Alnus twig greyishgreen, punctiform. Conidiophores growing densely, brown or dark brown, setiform, straight or flexuous, rarely simple, usually branched, up to 1 mm long, 5-7 jum wide at the base. Lateral branches arising out from main axis at various height, up to 400 jum long, 3-4 Aim wide at the base. Conidiogeneous cells polyphialidic, Polyphialides growing on main axis and also on lateral branches, pale brown at its base, subhyaline towards the apex, 10-30 jum long and 3-4 jum wide at the base. Conidia 8-11 x 2jam, cylindrical, hyaline, 1-septate. The present fungus differs from Chaetopsis grisea in having a highly branched structure of the conidiophores. Nevertheless the other characters of this fungus correspond to the description, therefore this difference is not considered as specific. Gonytrichum macrocladum (Sacc.) Hughes. M.B.ELLIS: Dematiaceous Hyphomycetes, p.

532. 1971. Found on several occasions during collections of autumn and winter litter samples from the Börzsöny Mts 1983., on strobile of Alnus glutinosa collected together with litter leaves of Alnus glutinosa

. Profuse growings of the fungus on this substrate were often observed. Colonies on strobile greyish-green, hairy. Conidiophores 250-350 jum long, mid- or reddish brown, paler towards the apex, 4-6 jum wide at the base. Collar hyphae only poorly developed at the upper third of the conidiophores, 120-150 jum long, whip-like towards their apex. Both tips of conidiophores and tips of collar hyphae fertile. Phialides subulate, 15-20 x 3-3.5 Aim, conidia unicellular, ellipsoidal, olivegreen, 4-5 x 1.6-2 Aim. The fungus was inoculated onto corn-meal agar and kept on 25 C°. One week old colonies 1-1.5 cm in diameter, velvety, fertile centre of the colonies arising conically, greyish-green and surrounded with a greyish-white sterile ring composed of immersed hyphae. Fascicles of hyphae 0.5-1.5 mm x 8-12 jum growing out from the fertile part of the colonies were observed. Fascicles brown and individual hyphae pale yellowish-brown, 2-3 jum wide, septated. Originating from the fascicles, very pale brown Chloridium-like conidiophores 30-120 jum long, 3-4 jum wide at their bases, gradually tapering to the apex, were observed. Both long and short conidiophores were fertile (Pl.I, Fig. 5).