nyctinasty defined in 1951 yearnyctinasty - nyctinasty;
nyctinasty - Response by plants to periodic alternation of day and night, e.g. opening and closing of many flowers, 'sleep-movements' of leaves. Related to changes in temperature, light intensity. See also: Photonasty, Tkermonasty.
near nyctinasty in Knolik
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