Do all trees form berries in late autumn?
I would suppose that all trees form some kind of fruit, berries, or seeds, because this has to be their main way of reproducing when growing naturally (of course, trees in cultivation will often be propagated by grafting, cuttings etc, but a species of tree couldn’t rely on this and so has to look after itself by shedding seeds in some form.) They don’t all necessarily fruit in late autumn, eg lots of fruit trees such as plums and cherries have mature fruit in summer. Trees have a very wide range of strategies for dispersing their seeds – the ones that produce fruits which coat a seed (eg hawthorn, elderberries, hips, cherries, sloes etc) have evolved to attract birds, which will eat the fruit, fly away, and excrete the seed somewhere else. Some trees produce nuts, many of which will be eaten by squirrels or jays etc, but some of which may be dropped when the animal or bird takes them away from the tree. Other trees, eg sycamore, have evolved seeds which are not attractive to birds but
