This last is one of the well-established English names used at the family level; others are "the grasses" for the family Graminae, and "the evening-primroses" for the Onagraceae.    From Wordnik.com.  [VERBATIM: The Language Quarterly Vol IV No 3] Reference

Vries: meaning and definitions - Vries: Definition and Pronunciation mutation: Mutation and Evolution - Mutation and Evolution In 1901 the observation of mutants, or sports, among evening primrose plants evening primrose - evening primrose evening primrose, common name for the Onagraceae, a family of plants of worldwide.    From Wordnik.com.  [infoplease - Daily Almanac] Reference

Onagraceae.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference