Evening Primrose

An genus native to North America consisting of about 124 species including annuals, biennials and herbaceous perennials. Flowers in this genus open mostly in the evening and exude a fragrance that attracts pollinating moths.

The common name comes from the German name for night cowslip which is the common name for a type of primrose.



Oenothera acaulis

Dandelion Sundrops

O. biennis

Common Evening Primrose

O. caespitosa Twisted Sundrops
O. fruticosa Common Sundrops
O. macrocarpa Ozark Sundrops
O. missoursensis Ozark Sundrops
O. odorata  
O. perennis  
O. pilosulla  
O. rosen Rose Sundrops
O. speciosa

Showy Evening Primrose

O. tetragona Common Sundrops
O. youngii Young's Sundrops

Species Hgt (in) Flower
O. caespitosa 4-8 white, pink Yes
O. fruticosa 18-24 yellow No
O. missoursensis 6-12 yellow No
O. odorata 18-24 yellow Yes
O. perennis 12-24 yellow No
O. speciosa 12-24 white, pink No
O. tetragona 12-36 yellow No

* Guides and Keys are from the book "Herbaceous Perennial Plants A Treatise on their Identification, Culture and Garden Attributes" by Dr Allan M. Armitage of the University of Georgia. Varsity Press, Athens, Georgia. 1989 ISBN 0-942375-00. More on Dr Armitage and his other books.


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