Selected images for spiny plumeless thistle (Carduus acanthoides )
Spiny plumeless thistle is an annual or biennial herbaceous plant that grows to 5 ft. (1.5 m) tall. It is an invader of pastures and other disturbed areas throughout parts of the western, central, and northeastern United States, as well as southern Canada. Flowering occurs from May to August. The flower heads are red to purple in color and up to 1 in. (2.5 cm) in diameter. Flower stems are branched with spiny wings extending to the flower heads. Hybridization with musk thistle (C. nutans) has been observed. Spiny plumeless thistle infests open, disturbed areas such as pastures, roadsides, and railroad right-of-ways. It can form dense stands that reduce the forage potential of pastures and suppress the growth of more desirable vegetation. Spiny plumeless thistle is native to Europe and Asia and was first discovered in the United States in Camden, New Jersey in 1878.
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0026037 spiny plumeless thistle Carduus acanthoides Flower(s) Gary L. Piper |
0026038 spiny plumeless thistle Carduus acanthoides Plant(s) Gary L. Piper |
1459784 spiny plumeless thistle Carduus acanthoides Foliage Steve Dewey |
1459786 spiny plumeless thistle Carduus acanthoides Flower(s) Steve Dewey |
5290083 spiny plumeless thistle Carduus acanthoides Plant(s) Todd Pfeiffer |
5290084 spiny plumeless thistle Carduus acanthoides Flower(s) Todd Pfeiffer |
5290085 spiny plumeless thistle Carduus acanthoides Foliage Todd Pfeiffer |
5290087 spiny plumeless thistle Carduus acanthoides Plant(s) Todd Pfeiffer |
5290088 spiny plumeless thistle Carduus acanthoides Plant(s) Todd Pfeiffer |
