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Plants of the Eloise Butler Wildflower Garden

Common
Name

Scientific
Name

Plant
Family

Garden
Location

Prime
Season

Prairie Blazing Star
Liatris pycnostachya Michx.
Aster
Upland
Late summer to Autumn
Other names and notes
Blazing Stars of the Liatris genus have general characteristics of: Stem leaves narrow and lance shaped, the flower heads appear on a spike. Heads may be composed of 5 to 60 small tubular 5-lobed purple flowers. L. pycnostachya grows from 2 to 4' high and has leafy and hairy stems up to the flower spike. Leaves are linear and up to 1/2" wide. Similar to L. spicata, flower heads densely pack the spike but each head has only 5 to 7 flowers. Flower heads open from the top of the stem downward. The flower head bracts are tapering to pointed tips and curve outward. Heads are stalkless. L. spicata has rounded bract tips that also curve outward. L. spicata and L. pycnostachya are difficult to distinguish without close inspection.
Prairie Blazing Star
Prairie Blazing Star
Below: Leafy and hairy stem
Prairie Blazing Star Leaves
Below: Flower head detail
Below: Note the outward curving pointed tips of the bracts.
Below: Flower heads forming seeds.
Prairie Blazing Star flowers
Prairie Blazing Star bracts
Prairie Blazing Star seed heads
This blazing star can bloom early - the photos are from August 4th.
 
 
Notes: Eloise Butler first recorded planting this species in 1907 from her source at what is now Minnehaha Park in Minneapolis. Curiously, Martha Crone did not list the species in her 1951 Garden Census. The plant is native to the central United States and in Minnesota is found in most counties south and west of a diagonal line running from Polk and Clearwater counties down through the north metro area counties.  
 

 
References: Plant characteristics are generally from sources 15, 16, 30, 31, 33, W2 & W3. Distribution principally from W2 and also 31, 34 and W1. Planting history generally from 1, 4 & 4a. Other sources by specific reference. See Reference List for details.  
©2008-2012 Friends of the Wild Flower Garden, Inc. All photos are the property of The Friends of the Wild Flower Garden unless otherwise credited. "www.friendsofthewildflowergarden.org" 110311