Extended Data Fig. 1: Distribution of sites with more than 20 years of leaf unfolding records over 1990-2015.
From: Accurate phenology analyses require bud traits and energy budgets

Sites including data for Common alder (Alnus glutinosa), horse chestnut (Aesculus hippocastanum), silver birch (Betula pendula), European beech (Fagus sylvatica), European ash (Fraxinus excelsior) and pedunculate oak (Quercus robur) from the PEP database.