According to some observers, there is a tendency for buttercups to have 5 petals, bloodroots 8, fireweeds 13, asters 21, common field daisies 34, and Michaelmas daisies 55 or 89.
Sipas disa vëzhguesve, është karakteristike që zhabinat kanë 5 petale, gjakataret kanadeze 8, pulithat 13, asterët 21, lulebardhat 34, dhe një lloj asteri 55 ose 89.