KARYOLOGICAL STUDY OF THE ORNAMENTAL PLAN TS OF THE SLOVAK FLORA

The present paper deals with chromosome counts of some ornamental plan ts that are cultivated in our country in gardens. Some of them are cul tivars of species native in our territory while others belong to the i ntroduced taxa. They are: Alcea rosea 2n = 42. Allysum montanum 2n = 3 2. Antirrhinum majus 2n = 16. Aster ster alpinus 2n = 18. Aurinia saxa tilis 2n = 16. Bellis perennis in = 18. Calendula officinalis 2n = 28. Callistephus chinensis 2n = 18. Campanula carpatica 2n = 34. Campanul a persicifolia 2n = 16. Capsicum annuum 2n = 24. Consolida regalis 2n = 16. Cosmos bipinnatus 2n = 24. Crocus vemus 2n = 32. Dahlia pinnata 2n = 64. Dianthus barbatus 2n = 30. Dianthus caryophyllus 2n = 30. Gyp sophila paniculata 2n = 34. Helianthus annuus 2n = 34. Cheiranthus che iri 2n = 14. Chrysantheum carinatum 2n = 18. Chrysanthemu segetum 2n = 36. Impatiens balsaminea 2n = 14. Lathyrus odoratus 2n = 14. Leucanth emum maximum 2n = 108. Lilium henryi 2n = 24. Lobularia maritima 2n = 24. Lupinus polyphyllus 2n = 48. Matthiola incana 2n = 14. Panicum cap illare 2n = 18. Papaver somniferum 2n = 22. Papaver nudicaule 2n = 14. Phaseolus coccineus 2n = 22. Pyrethrum parthenium 2n = 18. Ricinus co mmunis 2n = 20. Salvia splendens 2n = 44. Senecio cineraria 2n = 40. S ilene pendula 2n = 24. Tagetes erecta 2n = 24. Tagetes patula 2n = 48. Tagetes tenuifolia 2n = 24. Tanacetum vulgare 2n = 18. Trapeolum maju s 2n = 28. Tripleurospermum maritimum 2n = 18. Tulipa gesnerana 2n = 3 6. Tulipa tarda 2n = 24. Viola comuta 2n = 44. Viola wittrockiana 2n = 50. Xeranthnemum annuum 2n = 12. Zinnia elgans 2n = 24. These data ar e supplemented with short comments.