During the month of October, I am posting daily tweets referring to readings related to Quercus. These readings comprise 31 papers that have been important to my thinking on the origins, maintenance and implications of oak diversity. Because they are only 31, many important references have been missed, even papers by whole research groups who have influenced my thinking. The references are being posted chronologically, so if someone follows for the month, they get a sort-of-historical and somewhat idiosyncratic view of oak diversity research.