see it


Calylophus hartwegii      
Onagraceae Family     

Compiled by the Master Gardeners
of the University of Arizona Pima County Cooperative Extension.


Calylophus hartweggii
Calylophus hartweggii
Form: woody perennial - clump
Seasonality: perennial (see notes)
Size: 1 to 1.5ft tall, spread to 3ft
Leaves: narrow, evergreen
Flowers: yellow, cupped; last a single day, fresh buds replace just-closed flowers; resembles night-blooming primrose; bloom spring and summer
Fruit: unknown
Stems/Trunks: floppy stems become woody
Range/Origin: native to Texas, N. Mexico, Arizona and Mexico
Hardiness: 20°F or lower

Close-up of flower
Sundrops flower



Research by Master Gardeners Pat Perry and Barbara Schneidau


Periodically remove old grow to prolong blooming period.
Foliage becomes dull in winter months or becomes deciduous.

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This page was first created March 11, 2005 and last modified August 5, 2005.

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