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Cabeza Prieta Natural History Association
Sonoran Desert Plants
Castilleja exserta (Orthocarpus exserta) (Purple owl clover)

Ajo Peak at Night

 

 Castilleja exserta (Orthocarpus exserta)

Habitat: bajadas
Life Form: annual forb
Leaf Description: alternate simple leaves
Flower Color: magenta
Flowering Period: Mar. to May
Spines: spineless
Family: Scrophulariaceae (figwort family)
Abundance: common

 


References

"Arizona Flora", Thomas A. Kearney and Robert H. Peebles, 1960, University of California Press, Berkeley, Los Angeles, London (out of print)
    page 792

"Sonoran Desert Wildflowers", Richard Spellenberg, 2003, Globe Pequot Press, Guilford, Connecticut
    page 114

"A Field Guide to the Plants of Arizona", Ann Orth Epple and Lewis E. Epple, 1995, Falcon Press, Helena, Montana and LewAnn Publishing Co., Mesa, AZ
    plate 669
    page 230

"Native Plants for Southwestern Landscapes", Judy Mielke, 1993, University of Texas Press, Austin
    page 40

"100 Desert Wildflowers of the Southwest", Janice Emily Bowers, 1989, Southwest Parks and Monuments Association
    page 84

"Wildflowers of the Desert Southwest", Meg Quinn, 2000, Rio Nuevo Publishers, Tucson
    page 67

"A Natural History of the Sonoran Desert", Arizona-Sonora Desert Museum, Steven J. Phillips, Patricia Wentworth Comus. 2000. Arizona-Sonora Desert Museum Press, Tucson
    page 254

Photo Credits:
Photo #1

 

 

 

 

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Thomas R. Powell

 

Natural History of the Sonoran Desert and Refuge

Geology

Climate

Plants

Animals