<P> Norway and Sitka spruce are prone to the formation of Pineapple gall pseudocones caused by the woolly aphid, Adelges abietis . These are not cones, although they closely resemble them . </P> <P> Alder trees are not even conifers, however the mature seed bearing structures closely resemble cones . </P> <P> Because of their widespread occurrence, conifer cones have been a traditional part of the arts and crafts of cultures where conifers are common . Examples of their use includes seasonal wreaths and decorations, fire starters, bird feeders, toys, etc . An intriguing derivation of the impossible bottle mechanical puzzle takes advantage of the fact that pine cones open and close based on their level of dryness . In constructing the pine cone in the bottle display, a closed, damp cone of suitable size is inserted into a narrow - mouthed bottle and allowed to open upon drying . </P> <P> Cone cows are traditional homemade toys, made by children using material found in nature . The most common design is a spruce or pine cone with sticks or matches for legs, which can easily be attached by forcing them between the cone scales . Playing with cone cows often includes building an animal enclosure from sticks . For the most part, cone cows have been displaced by manufactured toys, at least in affluent countries, but the creation of cone cows still enjoys some popularity as an outdoor activity for children . </P>

Why are pollen cones located at the tips of branches