Светлана Евгеньевна Петрова The author studied gender ratios in three populations of a valuable dioecious plant - cloudberry grown in Kandalaksha district of Murmansk region. The paper describes the microstructure of flowering shoots in female and male cloudberries with the purpose of revealing new features of sexual dimorphism. Male individuals predominated in all of the studied populations. The largest percentage of female individuals was found on a forest site, the smallest percentage - in a boggy forest near a stream. The highest density and, accordingly, the largest number of individuals per square meter were found on a hummock-ridge bog. The anatomical structure of axes, leaves and sepals is similar in male and female plants. The difference is in the absence of mechanical tissue in peduncles in male forms. This fact can be explained by their short life unlike the peduncles of female individuals that need to hold the fruit for a long time. The obtained results have been compared with the data provided in the reference sources.
Научная статья 
anatomy of heterosexual