B. Papp szerk.: Studia Botanica Hungarica 30-31. 1999-2000 (Budapest, 2000)

Papp, Beáta, Ódor, Péter; Erzberger, Peter: Preliminary data about the present Hungarian local populations of rare European bryophytes

and Eger Teacher's College (EGR) were consulted. The retrieval was mainly based on locality descriptions of herbarium specimens and the diaries of Ádám Boros and László Vajda about their field trips (BOROS 1915—1971, VAJDA 1933-1978). The earlier localities were thoroughly examined; if the bryophyte looked for was found the size of its population was estimated, some of its abiotic and biotic conditions were examined and the localities were marked for further monitoring. If the search for an earlier occurrence was not successful, habitat conditions of the site were taken into consideration in order to arrive at a decision as to whether the potential habitat of species had been destroyed and hence the local population was likely to be extinct, or else the habitat had remained in good quality so that the species could still be expected to be found. Nomenclature and the European distribution of the species is given according to DULL (1983, 1984, 1985, 1992). Information about the habitat demands of the species is summarised according to BOROS (1968), ORBÁN and VAJDA (1983) and field experience of the authors. RESULTS Hepaticae Asterella saccata (Wahlenb.) Evans is a subcontinental species. It lives in calcareous open grasslands. It is vulnerable in Europe according to the RDB. Old occurrence confirmed: Baranya county, Szársomlyó, Nagyharsány, SW slope of the hill, on soil in limestone open grassland, ca 300 m a. s. 1., 01.05.1999, leg. Dénes, A., Papp, B. det. Papp.B.Two 10 x 10 cm

2 patches were found. Earlier data from here: 22.03.1925,16.05.1926, 27.04.1962, leg. and det. Boros, Á., on the SE slope: 25.03.1965, leg. and det. Vajda, L. Lophozia ascendens (Warnst.) Schust. is a boreal, montane species, it lives on well-decayed logs (obligate epixylic species). It is a rare species according to RDB. At present, it occurs in two localities in Hungary (Fig. 1). New occurrences: Heves county, Mátra Mts, Mátraháza, N slope of the Kékes hill in the Kékes North Forest Reserve, on decaying logs, 20.06.1999, leg. and det. Ódor, P. (ODOR 2000). It occurs on 4 well-decayed logs, the size of the patch inhabited by the population is ca 1 m

2

. The habitat is a collapsing phase of a semi-natural ravine-like beech-lime-maple forest, ca 900 m a. s. 1. It occurs together with Anastrophyllum hellerianum (Nees ex Lindenb.) Schust., Nowellia curvifolia (Dicks.) Mitt, in Godman, Calypogeia suecica (H. Arn. et J. Perss.) K. Mucll., Herzogiella seligeri (Brid.) Iwats., Lophocolea heterophylla (Schrad.) Dum., Rhizomnium punctatum (Hedw.) Kop., Hypnum cupressifonne Hedw. - Heves county, Bükk Mts, Nagyvisnyó,