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Photographer: Emmet J. Judziewicz
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Family Onagraceae
Calylophus serrulatus (Nutt.) P.H.Raven
yellow evening-primrose, yellow sundrops
Calylophus: Caly Greek for calyx; lophos for "the back of the neck; crest of a hill or helmet"
serrulatus: minutely serrate or saw-toothed
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| Status: | Special Concern |
| Plant: | erect, perennial, to 24" tall forb; stems usually clustered, often woody at the base |
| Flower: | 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 |
| Leaf: | many, narrowly oblong, often toothed |
| Habitat: | dry; prairies, plains, bluffs |
| (Glossary) |
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