Figure S1. State of preservation of pollen collected from mature staminate strobili of four mature yew specimens (T1–T4; 250 pollen grains × two strobili × tree).

Figure S2. Trend of lengthening of staminate strobili of Taxus measured on four mature specimens (T1–T4). The measurement (in mm) was calculated as the mean length of five strobili periodically collected from each specimen.

Figure S3. Total precipitation (mm) during the pollen production period of Taxus (January–April, top) and detail for March (bottom) as recorded at the Weather Station (Osservatorio Geofisico) of Modena.

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