Autumn is the season of berries. They're another thing to consider as part of the recent theme of seeds. The term berry is somewhat notional: from the botanical point of view a banana is a berry for example whereas a strawberry is an aggregated fruit.
 I'm happy to call anything smallish, roundish and colourful a berry if it's hanging off a plant but strictly speaking that's a bit simplistic. The first photograph shows the "berries" of Iris foetidissima in the back garden and I note that botanical books refer to them as seeds rather than berries. The second photograph shows the berries on a hedge of Cotoneaster cultivars up the road. They fit the botanical definition of a berry by virtue of being a simple fruit that contains pulp and seeds.
 Horticulture and agriculture tend to use the word berry to refer to edible produce which the above are not. Then again a blackbird was having a good peck at the Cotoneaster; what humans can't eat isn't the only consideration. Whether true berries or not the vivid colours in autumn have the effect of drawing attention to the plant- being eaten is one of the means that seeds get spread.