Fig. 1.

Cumulative seed germination (%, n = 50 seeds) of Narcissus pseudonarcissus under a (A) cool (5 °C), (B) average (10 °C) or (C) warm (15 °C) spring with all possible combinations of summer [cool (15 °C), average (20 °C) or warm (25 °C)], autumn [cool (5 °C), average (10 °C) or warm (15 °C)] and winter [cool (0 °C), average (5 °C) or warm (10 °C)] temperatures over 616 d with 84 or 112 d duration of the seasons. See the Materials and Methods for durations of the seasons. Year 1 (1 in column) comprised four seasonal periods from summer onwards; year 2 (2 in column) ended at the end of winter. The control (average seasonal temperatures) result is highlighted by light grey shading (centre of figure).