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Photographed in Wickenburg Mountains, Yavapai Co., Arizona. Sept. 6, 2008.
The fruits of turpentine broom have large, conspicuous oil glands emitting a very pungent odor on being pressed. Photographed in Wickenburg Mountains, Yavapai Co., Arizona. Sept. 6, 2008.
SHRUB: A meter tall hemisphere with many, smooth, yellow-green stems
radiating from base. In winter the smooth, leafless stems take on a
lemon-yellow cast - see photo below.
FLOWERS: The long, deep purple petals remain erect and confluent. Stan
Shebs has a close photo of the
flower on Wikimedia.
Rudkin's Swallowtail (Papilio polyxenes coloro) uses this plant for its caterpillar stage affirming the relationship between members of the citrus and carrot plant families.
Rutaceae -- Citrus Family
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