B. Papp szerk.: Studia Botanica Hungarica 32. 2001 (Budapest, 2001)
Bauer, Norbert: Vascular flora of the hill Strázsa-hegy and its vicinity (Pilis Mts, Hungary)
Myosotis ramosissima Rochel - Widespread in the degraded steppe meadows of the study area. (BOROS 1920). Myosotis stricto Link - In weedy grasses on the western pediment of Strázsa-hegy. Neottia nidus-avis (L.) Rich. - Only in the horbeam-oak forest of Tábla-hegy. (BAUER 1996, BAUER and BARNA 1999). Nepeta nuda L. (Syn.: N. pannonica L.) - Sporadic in the study area, found on Kis-Strázsa- and Strázsa-hegy on pediments covered with "loess grasses", and occasionally in pubescent oak woods. (KUN and SEREGÉLYES 1995). Nigella arvensis L. - Rare; in limestone "rock grasses" and weedy, dry, grassy areas. (KUN and SEREGÉLYES 1995). Nonea pulla (L.) DC. - Widespread in the steppe meadows of Strázsa- and Tábla-hegy. (BOROS 1919, KUN and SEREGÉLYES 1995, BAUER 1996). Odontites lutea (L.) Clairv. - Numerous plants were found in the sandpit of Sátorkőpuszta, and it occurs sporadically on the rocks of Strázsa-hegy as well. Odontites rubra (Baumg.) Opiz - Sporadic in weedy grasses and degraded natural communities. Oenothera biennis L. - Common in "weedy grasses" and degraded natural communities. (BAUER 1996). Onobrychis arenaria (Kit.) Ser. - Common in the closed sandy steppe meadows of Strázsahegy. (FEICHTINGER 1899, KUN and SEREGÉLYES 1995, BAUER 1996). Ononis pusilla L. - Widespread in the "rock grasses" and disturbed dry steppes on the southeastern pediment of Strázsa-hegy. (KUN and SEREGÉLYES 1995, KUN 1996). Ononis spinosa L. - Widespread in the steppe meadows of Strázsa- and Tábla-hegy. (KUN and SEREGÉLYES 1995, BAUER 1996). Onopordum acanthium L. - Common in degraded places in the areas lying between Strázsaand Kis-Strázsa-hegy. (BOROS 1919, KUN and SEREGÉLYES 1995, BAUER 1996). Onosma arenaria W. et K. - Common in the closed sandy steppe meadows in the vicinity of Strázsa-hegy. (FEICHTINGER 1899 R BOROS 1919, KUN and SEREGÉLYES 1995, BAUER 1996, BAUER and BARNA 1999). Onosma visianii Clem. - Rare; on the rocks of Strázsa-hegy. (FEICHTINGER 1899, KUN and SEREGÉLYES 1995). Orchis laxiflora Lam. subsp. palustris (Jacq.) Bonnier et Layens - Widespread in the sandpit of Sátorkőpuszta and southeast of Kis-Strázsa-hegy. (BAUER and BARNA 1999). Orchis militaris L. - Frequent in the sandpit of Sátorkőpuszta, and occurs in large numbers in dry grassy areas in the environs of Strázsa- and Tábla-hegy. (KUN and SEREGÉLYES 1995, BAUER 1996, BAUER and BARNA 1999). Orchis morio L. - Occurs on the western side of Strázsa-hegy, and east of Strázsa-hegy on the foothill's closed "sand grasses". (BAUER 1996, BAUER and BARNA 1999). Orchis purpurea Huds. - Rare; found only on the western slope of Strázsa-hegy in shrub forests. (KUN and SEREGÉLYES 1995, BAUER 1996, BAUER and BARNA 1999). Orchis tridentata Scop. - A few individuals found in Brachypodium pinnatum patches, on the southern slope of Tábla-hegy. (BAUER 1996, BAUER and BARNA 1999). Orchis ustulata L. - Common in the steppe meadows in the environs of Strázsa- and Tábla-hegy. (BAUER 1996, BAUER and BARNA 1999). Origanum vulgare L. - Common in pubescent oak forests. (KUN and SEREGÉLYES 1995, BAUER 1996). Orlaya grandißora (L.) Hoffm. - Sporadic in rocky grasslands and sandy steppe meadows of the study area. (KUN and SEREGÉLYES 1995).
