Sexual dimorphism and between-year variation in flowering, fruit set and pollinator behaviour in a boreal willow

Oxford

1988

S. 58-66

3 Abb., 6 Tab., 53 Lit. Ang.

Bandaufführung

10481S

156264

Sexual dimorphism in floral characters, flower visitor behaviour and fruit and seed set were studies in the boreal dioecious willow Salix myrsinifolia-phylicifolia. Males and females produced approximately the same number of catkins per individual, but males produced more flowers per catkin, females had a higher concentration of sugars in the nectar than males, but the standing crop of nectar, measured as ug organic carbon per flower, did not differ between the sexes. Females had a hexoserich nectar and males a sucrose-dominated nectar.