In the day I would be reminded of those men and women,
Brave, setting up signals across vast distances,
Considering a nameless way of living, of almost unimagined values.

Flowers are selective about what kind of pollinator they attract. Diurnal flowers use diverse colours to stand out in a competition against their neighbours for visual salience. But flowers with nocturnal anthesis are generally white, as they aim only to outshine the night.