You searched for: “nytinastic
nyctinasty, nytinastic, nyctinastism
1. The movements of flowers or leaves, caused by a regular cycle of changes in light and temperature.
2. Orientation movements of plants during the night.

Nastic movements of plant organs in response to the changes in light and temperature that occur between day and night (and vice versa). Examples are the opening and closing of many flowers and the folding together of the leaflets of clover and other plants at night.