Oenothera serrulata Nutt. (redirected from: Calylophus serrulatus)
Family: Onagraceae
yellow evening-primrose,  more...
[Calylophus australis Towner & P.H.Raven,  more]
Oenothera serrulata image
Emmet J. Judziewicz  
Etymology: Calylophus: Caly Greek for calyx; lophos for "the back of the neck; crest of a hill or helmet"
Plants: erect, perennial, to 24" tall forb; stems usually clustered, often woody at the base
Leaves: many, narrowly oblong, often toothed
Flowers: yellow, 4-parted, 1/3"-1" wide, stalkless, sepals with sharply raised midrib, 8 stamens, stigma shield-shaped; solitary from the upper leaf axil; blooms June-July
Habitat: dry; prairies, plains, bluffs
Conservation Status: Special Concern
Oenothera serrulata image
Emmet J. Judziewicz  
Oenothera serrulata image
Emmet J. Judziewicz  
Oenothera serrulata image
Emmet J. Judziewicz  
Oenothera serrulata image
Emmet J. Judziewicz  
Oenothera serrulata image
Aaron Carlson  
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