Features of flowering collection of tropical water lilies in the Stavropol Botanical Garden

Abstract

In 2016, the study of morphological features of the collection of tropical water lily was started. Plants are grown in containers of up to 400 litres, which are placed in an artificially heated basin with a total water mirror area of 85 m 2 . After 1080 days soil and water are replaced due to the reduction of nutrients. During vegetation, the water temperature is constant - plus 28-29 °C. The beginning of vegetation is noted from the II decade of January, flowering - from the I decade of February at Nymphaea cv. Mrs. George C. Hitchcock, N. capensis var. alba , N. capensis cv. Rosea и N. nouchali var . caerulea. Later and not prolonged flowering was observed - from the II decade of July at N. gigantea , N. cv. Nangkwaug Fax and N. cv. Nangkwaug Apsara. Two phases of flowering, the first beginning from the third decade of January to the second decade of April and the second phase from the third decade of June - N. lotus var. thermalis , N. daubeniana , N. capensis var. alba . Mass - from the II decade of May to the I decade of September. Depending on the species or variety, the duration of the flowering phase in the year is in N. cv . Nangkwaug Fax, N. cv. Nangkwaug Apsara, N. capensis var. alba - 43-65 days, the rest have 79 to 247 days. The largest number of flowers in 2016-2009 observed in N. lotus var. thermalis - 288 flowers, N. nouchali var . caerulea - 255 flowers, N. capensis cv. Rosea - 165 flowers. The smallest - N. cv. Nangkwaug Fax - 46 flowers, N. cv. Nangkwaug Apsara - 32 flowers. They are promising for cultivation in closed water bodies.