Adatok Budapest környéke flórájának ismeretéhez IV.

New or recently confirmed localities of more than 50 rare or poorly known taxa (including 10 ferns) are presented from the territory of Budapest and adjacent territories. Some of those records are new for the spontaneous flora of particular territories, specifically: Anthericum liliago (Szentendre Island), Artemisia alba (Tétény Highland), Cerastium lucorum (Buda Mts, Börzsöny), Epipactis albensis (Budapest, Pilis), E. futakii (Börzsöny), E. moravica (Börzsöny, Visegrád Mts), Hippophae rhamnoides (Szentendre Island), Myosotis discolor (Börzsöny). The new localities of Cnidium dubium, Platanthera chlorantha, Spiranthes spiralis, Sternbergia colchiciflora, Veronica jacquinii and Viola stagnina are also noteworthy. Some species are discussed in more detail in relation to their former Hungarian literature records.