关键词: 睡莲属, 开花习性, 日变化, 园林植物

Abstract: To understand the daily variation of Nymphaea flowering, this paper investigated and recorded the flowering process of Nymphaea plants on campus’ wetland park in Guangzhou. The results showed that the daily variation of the tropical water lilies flowering at night was the flowers opened at night and continued to the next morning, while the tropical water lilies and hardy water lilies flowering during the daytime, and the flowering time varies depending on the species. Tropical water lily Nymphaea ‘Independence’ and hardy water lily Nymphaea ‘Colorado’ flowering during the daytime, their single flowering period was 3—4 d; N. mexicana, a hardy water lily, its single flowering period was 2 d. The male and female stamens matured successively to achieve cross-pollination, which resulted in different forms of stamens during flowering of water lilies. From October to December, flowering clock of Nymphaea ‘Independence’ was that opens at sunrise and closes at sunset, the shortened photoperiod resulted in the shortened open and close rhythm of the Nymphaea ‘Independence’. The results provided accurate data support for the selection and configuration of Nymphaea in garden water features.

Key words: Nymphaea, flowering habit, daily variation, garden plant