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The biological casing of the hillbanks built from carbon waste rocks through turfness is achieved with seeding in the ground of properly selected grass mixtures accompanied by artificial fertilizers. The lawn on such a ground can be enriched floristically through the supplementary seeding of the Phacelia tanacaetifolia cultivar Stala. The applicability of the Phacelia tanacaetifolia cultivar Stala was estimated basing upon its germination ability and upon the further phases of its growth and development on the carbon rock grounds of known physical and chemical characteristics. The results confirm that Phacelia may be used to achieve colour effects of the lawn under the studied conditions. The blue Phacelia tanacaetifolia cultivar Stala gives a pronounced colour effect to the lawn from June till August in the year of sawing. In the following year the colour effect is less pronounced with a maximum in May and June. The carbon rock ground accompanying the black coal exploration was used for the landscaping of recreational parks. The main green element of such a landscape is the flowering meadow lawn. To achieve the controlled colour effect of the formed plant community the applicability of the Phacelia tanacaetifolia cultivar Stala was investigated. The applicability of the cultivar Stala was estimated basing upon its germination ability and upon the further phases of its growth and development on the carbon rock grounds of known physical and chemical characteristics. The results confirm that cultivar Stala may be used to achieved colour effects of the lawn under the studied conditions. The blue Phacelia tanacaetifolia cultivar Stala gives a pronounced colour effect to the lawn from June till August in the year of sawing. In the following year the colour effect is less pronounced with a maximum in May and June.
The planthopper and leafhopper communities inhabiting various plant assemblages covering coal-mine dumps in the vicinities of Ruda Śląska city and Mikołów city (Upper Silesia, Poland; UTM CA46) are described. Plots , are described in details, with plant species and phytosociological groupment given, if possible. Dynamics of planthoppers and leafhoppers populations, dominance structure and diversity indices, constancy index are described and analyzed. Chorological composition, as well as ecological content of communities are discussed. Species composition similarity indices are also analyzed. List of 109 species recorded in analyzed plots is given. Two species recorded are new to Polish fauna: Mocydiopsis parvicauda RIB. and Psammotettix dubius OSS., and 15 species are new to fauna of Upper Silesia region: Cixius distinguendus KMB, Tachycixius pilosus (Ol.), Delphacodes venosus (germ.), Javesella salina (hpt), Oncopsis carpini (j. shlb.), Tremulicerus tremulae (estl.), Zyginidia scutellaris (h.-S.), Macrosteles sordidipennis (StAl), Doratura impudica horv., Rbytistylus proceps (KMB), Rhopalopyx preyssleri (H.-S.), Ophiola russeola (FALL.), Arocephalus languidus (FL.), Psammotettix sabulicola (Curt.) and Mocuellus metrius (Fl.).
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