Botanical curiosities of Prodarjeva Grapa gorge in the upper Bača Valley (western Slovenia) / Botanične posebnosti Prodarjeve grape v zgornji Baški dolini (zahodna Slovenija)

We researched the vegetation of the protected lower part of the Prodarjeva Grapa gorge in the foothills of Mt. Porezen in the upper Baca Valley. Its botanical curiosities are the localities of protected or rare species Moehringia villosa, Pri­mula auricula,Pinguicula vulgarisand Carex frigida. All four occur (but are not limited to) on the rocky and gra­velly shady area in the lower part of the gorge with a distinctly cold local climate. The relief, climate and parent material (platy limestone with admixture of marlstone and chert) are the decisive factors that allow for the occurrence of the previously unknown community of wet spring areas, which we classify into the new association Pinguiculo vul­garis-Cari­cetum frigidae, alliance Cratoneurion commutatiand class Montio-Cardaminetea, in this area. It is syndynamically connected with surrounding communities of wet screes and rock crevices. Screes under the rock wall are partly overgrown with a community of Molinia arundinaceaand Adeno­styles glabra (Adenostylo glabrae-Molinietum arundinaceanom. prov.), on the fringes in places also with an open low-growth hop-hornbeam and manna ash forest (Palustriello commutati-Ostryetum carpinifoliaenom. prov.). Key words: vegetation, synsystematics, Carex frigida, Moehringia villosa, Pinguicula vulgaris, Primula auricula,Baca Valley, Porezen, Natura 2000   Izvlecek Raziskali smo rastje spodnjega, zavarovanega dela Prodarjeve grape v prigorju Porezna v zgornji Baski dolini. Njene botanicne posebnosti so nahajalisca zavarovanih ali redkih vrst: Moehringia villosa, Primula auricula,Pinguicula vulgarisin Carex frigida. Vse stiri med drugim rastejo v skalnatem in gruscnatem osojnem obmocju v spodnjem delu grape z izrazito hladnim krajevnim podnebjem. Relief, podnebje in geoloska podlaga (ploscasti apnenec s primesjo laporovca in roženca) so odlocilni dejavniki za tukajsnje uspevanje do zdaj nepoznane rastlinske združbe vlažnih povirij, ki jo uvrscamo v novo asociacijo Pinguiculo vulgaris-Caricetum frigidae,v zvezo Cratoneurion commutatiin v razred Montio-Cardaminetea. Sindinamsko je povezana z okoliskimi združbami vlažnih melisc in skalnih razpok, pri cemer se melisca pod steno deloma zarascajo z združbo trstikaste stožke – Adenostylo glabrae-Molinietum arundinaceanom. prov., na robovih tudi z vrzelastim nizkim gozdom crnega gabra in malega jesena – Palustriello commutati-Ostryetum carpinifoliaenom. prov. Kljucne besede: vegetacija, sinsistematika, Carex frigida, Moehringia villosa, Pinguicula vulgaris, Primula auricula, Baska dolina, Porezen, Natura 2000