Owls clover (Castilleja exserta)
Description
The Castilleja exserta plant is an annual about 1 foot (0.30 m) tall with a hairy stem covered in thready leaves. Like other related Castilleja plants, this is a hemiparasite which derives some of its nutrients directly from the roots of other plants by injecting them with haustoria. This is the reason for its small, reduced leaves.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Lamiales
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Family: Orobanchaceae
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Genus: Castilleja
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