Blue Cohosh Caulophyllum thalictroides (Linnaeus) Michaux    
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Ranunculales   >   Family Berberidaceae   >   Genus Caulophyllum   

Status:

Blue Cohosh is native to eastern North America. It is a spring perennial of rich deciduous woodlands, such as rich coves and well-drained floodplain forests.

Description:

The yellow to greenish flowers of Blue Cohosh give rise to large blue seeds that become readily visible as they quickly burst their little-developed fruit walls. This plant generally has two leaves--a large compound stem leaf and a smaller compound leaf below the inflorescence.

Where to find:

In Maryland, Blue Cohosh is common in the mountains, rare in the Piedmont, and little known on the Coastal Plain.

There are 84 records in the project database.

View species at Maryland Plant Atlas

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Blue Cohosh found blooming in Garrett Co., Maryland (5/1/2010). Photo by Jim Brighton. (MBP list)

Blue Cohosh blooms in Washington Co., Maryland (4/25/2016). Photo by Jim Stasz. (MBP list)

Blue Cohosh blooming in Washington Co., Maryland (4/15/2013) Photo by Ed Boyd. (MBP list)

Blue Cohosh in Howard Co., Maryland (5/10/2010). Photo by Bill Harms. (MBP list)

Blue Cohosh blooming in Washington Co., Maryland (4/25/2013). Photo by Bill Hubick. (MBP list)

Blue Cohosh in Washington Co., Maryland (4/30/2016). Photo by Jane Hill. (MBP list)

Blue Cohosh fruiting in Garrett Co., Maryland (9/11/2013). Photo by Jim Stasz. (MBP list)

Blue Cohosh in Harford Co., Maryland (4/5/2020). Photo by Bob Cammarata. (MBP list)

Blue Cohosh in fruit, in Harford Co., Maryland (6/27/2020). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Blue Cohosh just emerging, in Harford Co., Maryland (4/2/2017). Photo by Josh Emm. (MBP list)

Blue Cohosh in fruit, in Howard Co., Maryland (6/3/2019). Photo by Matthew Beziat. (MBP list)

Blue Cohosh in fruit in Washington Co., Maryland (10/26/2019). Photo by Sue Muller. (MBP list)

Blue Cohosh with fruit in Garrett Co., Maryland (7/8/2012). Photo by Bill Hubick. (MBP list)

Blue Cohosh in fruit in Garrett Co., Maryland (8/17/2014). Photo by Boyer and McDowell. (MBP list)

Blue Cohosh in Washington Co., Maryland (4/11/2015). Leaves are unfurling and flower buds are apparent. Photo by Jane Hill. (MBP list)

Blue Cohosh flower and flower bud, in Howard Co., Maryland (5/8/2017). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)

Blue Cohosh in bloom in Howard Co., Maryland (5/26/2017). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)


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