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
old water mills, and since most of these mills have been destroyed, the species appears to be very much threatened in Hungary. It is a species of the temperate zone. Rare according to the RDB. In Hungary, it was usually found on rocks at water mills and sometimes on calcareous rocks of streams in ravines. It has been found at present only in two localities, and one new site was discovered. Old occurrences confirmed: Veszprém county, Bánd, at the mill Deszkametsző-malom at the hill Essegvár, on the rocks in the ditch of the mill, 04.07.1998, leg. and det. Papp, B. Earlier data: 23.10.1949, leg. and det. Boros, Á. It forms 2-3 small patches of 4-5 cm in diameter near the water. The rocks and the wall of the ditch of the mill are covered mainly by Rhynchostegium riparioides (Hedw.) C. Jens, and Cratoneuron filicinum (Hedw.) Spruce. - Veszprém county, Kislőd, at the mill Vashámori malom, on the wall of the ditch, 03.07.1998, leg. and det. Papp, B. Earlier data: 05.06.1949, leg. and det. Boros, A. The mill is almost a ruin; there is no water in the ditch. Some patches of the species (in total ca 250 cm 2 ) are still alive at the base of the wall, shaded by high growing weeds. This population is greatly threatened. New occurrence: Veszprém county, Örvényes, on the stones of the stream Pécsely-patak in the Szakadék-valley, ca 150 m a. s. 1., 31.07.1994, leg. and det. Papp, B. It lives on the vertical surfaces of some rocks of 40-50 cm in diameter near the water. The total area covered is about 40-50 cm 2 . It is associated with Cratoneuron filicinum (Hedw.) Spruce, Amblystegium varium (Hedw.) Lindb., Eurhynchium speciosum (Brid.) Jur. Checked former locations, from which Fissidens arnoldii has disappeared (with corresponding dates and collector names): Fejér county, Pusztavám, Szép-víz, mill (05.09.1937 and 05.10. 1948, leg. and det. Boros, A.), the mill still exists, there is no water in the ditch. It is covered by dense vascular plant weed vegetation. - Komárom-Esztergom county, Környe, mill (21.07. 1935, leg. and det. Boros, Á.), the mill is destroyed, the two ditches with water exist, but the water comes from a fish pond and seems to be highly eutrophicated. The species was not found. - Pest county, Szigetújfalu, Kőhíd bridge (09.05.1954, leg. and det. Boros, Á., Vajda, L.), the bridge has been reconstructed, the rocks near the water have been replaced by concrete elements. Water can be found only temporarily in the stream bed. - Veszprém county, Ajka, Ciglic-mill (05.06.1949, leg. and det. Boros, Á.), ruins, it has not been working ca 15 years. Veszprém county, Ajka, Trummer-mill (05.06.1949, leg. and det. Boros, A.), it was destroyed ca 15 years ago. - Veszprém county, Bánd, Steinecker-mill (23.10.1949, leg. and det. Boros, Á.), ruins, there is no water in the ditch. On the rocks ouly Fissidens pusillus (Wils.) Milde was found. - Veszprém county, Herend, Legalsó-malom, mill (23.10.1949, leg. and det. Boros, Á.), it has been reconstructed, the ditch is filled with soil. - Veszprém county, Kislőd, Községi mill (05.06.1949, leg. and det. Boros, A.), it is destroyed. - Veszprém county, Márkó, Márkó mill (23.10.1949, leg. and det. Boros, A.), it has been reconstructed, the ditch is covered by concrete elements. - Veszprém county, Nagyganna, Rózsa-mill (21.10.1950, leg. and det. Boros, A.), there is no water in the ditch and it is full of dense vascular plant weed vegetation. - Veszprém county, Ősi, Külső-malom, mill (30.10.1949, leg. and det. Boros, A.), it is destroyed. Veszprém county, Városlőd, mill (23.10.1950, leg. and det. Boros, Á.), it is destroyed. Further search is needed at: Veszprém county, Gézaháza, Ördög-árok gorge, 05.07.1969, leg. and det. Boros, A., Vajda, L. - our recent checking was unsuccessful, but the place is in good condition, no disturbance can be observed, there is water in the stream.- Veszprém county, Bánd, mill at Menyeke-puszta, 23.10.1949, leg. and det. Boros, Á., the mill is still there. It is situated on a closed private area, and the checking was impossible without the presence of the owner.
