''Calylophus'' is a genus of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

s in the family

Onagraceae The Onagraceae are a family of flowering plants known as the willowherb family or evening primrose family. They include about 650 species of herbs, shrubs, and treesCalylophus berlandieri'' Spach (Berlandier's sundrops) *'' Calylophus hartwegii'' (Benth.) Raven (Hartweg's sundrops) *'' Calylophus lavandulifolius'' (Torr. & Gray) Raven (lavenderleaf evening primrose) *''

Calylophus serrulatus ''Oenothera serrulata'' is a species of flowering plant in the Onagraceae known by the common name yellow sundrops. Other common names include halfshrub sundrop,

'' (Nutt.) Raven (halfshrub sundrop) *'' Calylophus toumeyi'' (Small) Towner (Toumey's sundrops) *'' Calylophus tubicula'' (Gray) Raven (Texas sundrops)

References

ITIS standard report page: ''Calyophus''
Onagraceae Onagraceae genera {{Myrtales-stub