Mariola
Parthenium incanum
Near Camp Verde, Yavapai Co., Arizona, USA. 16 Sept. 2013.
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FLOWERS: There are usually five larger florets around the perimeter of the small heads. They are white as are the disc florets.
PHYLLARIES: The bracts forming the involucre are of two sizes in inner and an outer rows.
LEAVES: The leaves are partly divided into rounded segments. The term is pinnatifid meaning the leaves are not truly compound because no portion of the midrib is free.
RANGE: Where sycamore canyons cut through limestone formations this plant may be a common componant. Ranges into Mexico and New Mexico.
SHRUBBY: Weekly shrubby plant with many intricate stems and mostly less than a meter tall.
UNARMED
