34 Phenology in Essex: lessons from the past and examples of recent trends
Figure 1. The relationship between mean flowering date of wood anemone in Essex 1891-
1927 and February mean temperature. The result for 1999 is added as an open circle.
Wood anemone
3.5 4.5 5.5 6.5
February temperature
Figure 2. The relationship between mean flowering date of horse chestnut in Essex 1891-
1927 and April mean temperature. The result for 1999 is added as an open circle.
Horse chestnut
April temperature
Essex Naturalist (New Series) 17 (2000)