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Summary: The current situation of parkland in Turin metropolitan area is described. Recently (1979–81) a large area (18 hectars) was turned into a Park named Colonnetti. A project of total re-organisation of the area is proposed.In particular, from the botanical point of view, we suggest the use of non allergenic plants to reduce the allergenic airborne pollen concentration.The multidisciplinary exchange of information among experts such as physicians, botanists, local authorities and the people in charge of the public green areas, may play an important role and contribute to the improvement of the overall situation of airborne pollens in the city atmosphere.

Summary: The morphopalynological cards ofThuja orientalisL. and ofCryptomeria japonica(L. fil.) D. Don were illustrated as part of a more comprehensive study on ornamental Pinophyta. Pollens from the original area of the two species were also compared with grains coming from plants cultivated in Italy. In the case ofCryptomeria japonica(L. fil.) D. Don DV, D01, D02, exine, min. and max. diameters, calculated on a japanese sample, differed significatively from the italian sample. In the case ofThuja orientalisL. no significant differences were observed. Pollen from the two italian sites did not show significative differences in size and shape. Pollens acetolysed with the traditional method (Erdtman, 1960) were compared with pollens treated with the Tatzreiter method (1985). Morphometric analysis showed similar values for both species.

Riassunto: In accordo al programma della Flora Palinologica Italiana sono state allestite le schede morfopalinologiche, su pollini freschi ed acetolizzati, diArtemisia glacialisL.,Artemisia genipiWeber,Artemisia umbelliformisLam.; per ciascuna specie sono stati studiati materiali provenienti da due diverse localit. Delle specie studiate sono riportati i dati di distribuzione e la posizione fitosociologica. Sui diversi parametri considerati stata condotta l'analisi della varianza relativamente ai parametri specie, stazione e trattamento.

Summary: By means of two Burkard Volumetric Spore-Traps situated in the center of Torino and Perugia, pollen was sampled between March and August for three years (1982–83–84). The two pollen spectra, with special reference to trees, were compared for pollen levels and duration of season in the two cities.Comments on vegetation in and around Torino and Perugia and meteorological data are compared with the two pollen spectra.

Summary: Palynological cards ofCorylus avellana cv. TGL andCorylus maxima Miller are presented for fresh and acetolyzed pollens, according to the project «Flora Palinologica Italiana». Both species are interesting from the agricultural point of view, also for the possibility to obtain interspecific hybrids. The difference of the P/E ratio between the two entities is highly significant. In sprite of this fact, is not possible to discriminate the two pollen types in aerosporological analysis for their extreme similarity.

Summary: In a series of studies on exotic ornamental Pinophyta, palynological cards ofChamaecyparis lawsoniana(A. Murray) Parlatore (S 227) andCupressus arizonicaGreen (S 228) are proposed for fresh and acetolyzed pollens.