Chestnuts in Blossom
Aesculus (its various species often known as horse chestnuts) is a beautiful tree widely found on city streets and in villages. Let us map the chestnuts' blossom front.
Many natural phenomena occur in cycles. Seasonal wildlife changes are studied in the discipline of phenology. Phenology addresses, in particular, seasonal phenomena in plants. The life of many plants features a notable phenological phase, 'flowering'. Watching a flowering plant, you may observe several periods: the initial stage, mass flowering, end of flowering, and fruit set. To draw a phenological map of chestnut flowering we'll focus on the mass stage. It starts when most blooms have opened.