Castilleja exserta      
Owl's clover    
Scrophulariaceae Family     

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


Form: low, shrubby wildflower
Seasonality: annual
Size: 9in high with 1 ft spread
Leaves: feather or ferny, basal leaves
Flowers: pink to purple tufted spikes; bloom March to May
purple flowers
blooms on castilleja exserta
Fruit: n/a
Stems/Trunks: n/a
Range/Origin: mid-elevation grasslands of Southwest US and northern Mexico
Hardiness: 10-15 °F



Castilleja exserta
Owl's clover in a mixed wildflower bed


Research by Master Gardener Devona Painter


Can sow as late as November or December in irrigated garden.
Grow best in association with its community of spring wildflowers, including baby blue-eyes, California gold poppy, Lupines, orange globe mallow, desert bluebells, and sideoats grama.

Formerly known as Orthocarpus purpurascens

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This page was first created May 31, 2004 and last modified June 1, 2006.

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