Both wind and water pollinated flowers are not very colourful and do not produce nectar and scent.
True
The flowers produced by anemophilous and hydrophilous plants are less attractive, have less or no smell and are nectarless as they do not have to attract biotic agents like insects. Their major adaptation is to produce pollens in large numbers to gain access to water bodies or blowing wind which act as carriers of pollen grains.