''Cirsium parryi'', or Parry's thistle, is a species of
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
n flowering plants in the family
Asteraceae. It is native to the
southwestern United States
The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, Ne ...
, where it has been found in Colorado, Arizona, and New Mexico.
[''Cirsium parryi''.]
The Nature Conservancy.Biota of North America Program 2014 county distribution map
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''Cirsium parryi'' is a Biennial plant, biennial herb with a hairy stem growing up to 200 cm (80 inches) tall or more. The leaves are oblong or lance-shaped and measure 10 to 30 centimeters (4-12 inches) long. They are often toothed or divided partly into lobes. The lower ones have usually withered by flowering time. The inflorescence may contain many Head (botany), flower heads at the end of the stem and near the upper leaves. Each is up to 2.5 centimeters (1 inch) wide with spiny bracts at the base. The spiny bract, phyllaries along the sides of the flower head are green with brownish tips. In the head are many Disc floret, flowerss which are generally yellowish, or sometimes purplish or white. There are no ray florets. The fruit is an achene which may be over 2 centimeters (0.8 inches) long including its Pappus (flower structure), pappus.[''Cirsium parryi''.]
Flora of North America.
This plant grows in moist areas in coniferous forests and meadows and near streams.[
This species may form Hybrid (biology), hybrids with ''Cirsium grahamii, C. grahamii'' in Arizona and ''Cirsium canescens, C. canescens'' in Colorado.][
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References
External links
{{Taxonbar, from=Q5122068
Cirsium, parryi
Plants described in 1874
Flora of the Western United States
Taxa named by Asa Gray