Pollen flows of medicinal nd ornamental flowers of mullein (Verbascum L.), tutsan (Hypericum L.) and meadowsweet (Filipendula (L.) Max.)
1999
Szklanowska, K. | Denisow, B. (Akadmia Rolnicza, Lublin (Poland). Katedra Botaniki)
In the years 1996-98 the studies examined the period, length of blooming and pollinating efficiency of three species (Verbascum phomoides L., Hypericum perforatum L., Filipendula ulmaria (L.) Max). The studies were carried out in Pulawy, where apicultural plants are grown. The flowers of this species are most frequently visited by honey bees and bumble bees. All the plants examined are found in natural communities but the present study concerned the plants grown in compacts plots. The study concentrates mostly on blooming biology, daily and seasonal dynamics of blooming and the influence of weather conditions on these processes. The weather conditions has little influence on their daily rhythm of blooming but it proved to be a decisive factor as far as the period and the length of blooming are concerned. The quality of pollen produced from one thousand anthers for all spieces examined depended on the size of anothers. The pollen efficiency from ten flowers depended not only on the size of anothers but also on their number in a flower
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