Multiple choice Some plants such as Viola (common pansy), Oxalis and Commelina produce .......... Chasmogamous flowers with exposed anyhers and stigma Cleistogamous flowers which do not open at all. Both None Reveal answer Fill a bubble to check yourself C Correct answer Explanation Viola, Oxalis, and Commelina are classic examples of plants that produce both chasmogamous (open) and cleistogamous (closed) flowers.