Figure 1
From: Extreme summer heat and drought lead to early fruit abortion in European beech
Examples of beechnut development of European beech: (a) regularly developing beechnut cupula with beechnuts in summer; (b) regularly developed beechnut cupula in autumn after release of beechnuts; (c) poorly developed beechnut cupula with beechnuts in summer found in litterfall traps two months before regular beechnut cupulas are typically falling. Photos by Anita Nussbaumer.
