Spiny Plumeless Thistle Carduus acanthoides LinnaeusNon-native  -  Invasive    Synonyms: Spiny Plumeless-thistle.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Asterales   >   Family Asteraceae   >   Genus Carduus   

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Spiny Plumless Thistle in Washington Co., Maryland (6/30/2017). Photo by Sue Muller. (MBP list)

Spiny Plumeless Thistle blooming in Washington Co., Maryland (7/22/2013). Photo by Jim Stasz. (MBP list)

Spiny Plumeless Thistle blooming in Washington Co., Maryland (7/22/2013). Photo by Jim Stasz. (MBP list)

Spiny Plumeless Thistle in Washington Co., Maryland (9/25/2020). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Spiny Plumeless Thistle in Washington Co., Maryland (9/25/2020). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Spiny Plumeless Thistle in Allegany Co., Maryland (6/16/2012). Photo by Kimberly Booth. (MBP list)

Spiny Plumeless Thistle in Washington Co., Maryland (6/25/2017). Photo by Wayne Longbottom. (MBP list)

Spiny Plumeless Thistle in Frederick Co., Maryland (7/17/2018). (c) Nelson, some rights reserved (CC BY-NC). Photo by Nelson via iNaturalist. (MBP list)


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MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/.