B. Papp szerk.: Studia Botanica Hungarica 32. 2001 (Budapest, 2001)

Papp, Beáta; Sabovljevic, Marko: Contribution to the knowledge of the bryoflora of the region of Petnica (W Serbia, Yugoslavia)

Bryum gemmiferum*, B. rubens*, B. ruderale*, Fissidens gracilifolius*, F. pusillus*, Rhynchostegiella jaquinii*, R. tenella, Seligeria cf. paucifolia*, S. pusilla*, Weissia condensa, W. longifolia, W. cf. squarrosa*. The species marked with asterisk are new for Yugoslavia. We also recorded three taxa which are included in the Red Data Book of European Bryophytes (ECCB 1995). These are: Anomodon rostratus (R), Rhynchostegiella jaquinii (R) and Weissia squarrosa (R). Two species are European endemics: Bryum gemmiferum and Weissia squarrosa. We found the banks of the Pocibrava rivulet to be extremely rich in bryophyte species. To mention two redlisted moss species, Anomodon rostratus and Rhynchostegiella jaquinii, occur on the rocks along the stream! On Figure 2 the exact location of the most abundant, characteristic species along the rivulet are illustrated. Considering that the vicinity of Petnica has not been previously investigated - only some records are mentioned in a publication of VELJIC and MARIN ( 1997) - all citations can be taken as new locality records for the species for Serbia and even for the Balkans. Shown by Figure 3, among the bryophytes of the region of Petnica, the most highly presented type of distribution is that of the temperate zone of Europe (-52% (51.49%)). However, on the basis of the low average altitude of 200 m, the relatively high percentage (18.66%) of the species with (sub)boreal-montane distribution type was not expected. We explain this by the proximity of the mountains and the number of gorges with peculiar microhabitats providing expansion routes for these bryophytes. Species with sub-Mediterranean-montane (6.72%), and suboceanic-montane (7.46%) distribution types are equally present in the region, as well as those with sub-Mediterranean (5.22%) and suboceanic (5.97%) types. This could also be a consequence of the many gorges and canyons that channel the influence from the Mediterranean regions into our area, and also of the good surface hydrology with the great air humidity in some microhabitats. submed 5% suboc 6% Fig. 3. European distribution types of bryophytes recorded in the region of Petnica.