Even in absence of pollinating agents seed setting is assured in
Commellina
Zostera
Salvia
Fig
The plant known as Commelina develops chasmogamous and cleistogamous blooms. The stigma and anther of chasmogamous flowers are visible as they open. Cleistogamous flowers have completely closed blooms. These blooms pollinate themselves.
The final answer is Even in the absence of pollinating agents, the seed setting is assured in Commelina.