Wildflowers of the United States

Tall Coreopsis, Tall Tickseed - Coreopsis tripteris

Genus Common Name: Tickseed

Native Status: Native

Dicot Perennial Herb

Coreopsis tripteris - Tall Coreopsis, Tall Tickseed. Coreopsis is a genus of 33 species native to the United States, with a species found in every state except Alaska, Nevada, and Utah. Coreopsis triperis is found in 27 states. It is Endangered in Maryland.

While most Coreopsis species are 3 feet tall or shorter, this plant can be 8 or more feet tall. The Tickseed part of the name is because the seed is hard, dark, and flat, looking like the namesake arachnid.

Found in:
AL, AR, CT, DC, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, MS, NC, OH, OK, PA, RI, SC, TN, TX, VA, WI, WV

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Distribution of Coreopsis tripteris in the United States and Canada:

Map courtesy of The Biota of North America Program.
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Site: Walker County, GA Date: 2010-August-21	Photographer: Gerald C. Williamson Nikon D60 Tamron SP 90MM f/2.8 AF Macro
Tall Coreopsis has 8 yellow ray flowers and a brown disk. This is one of the Tickseeds with rounded ray flowers.

Site: Walker County, GA Date: 2010-August-21	Photographer: Gerald C Williamson Nikon D60 Tamron SP 90MM f/2.8 AF Macro
The ray flowers of most or all Tickseeds have teeth on their tips; in the case of Tall Tickseed they are very small indentations. The outer bracts of the Tall Coreopsis involucre are very narrow, like little spikes.
Click on the photo for a larger image
Site: Walker County, GA Date: 2010-August-21	Photographer: Gerald C Williamson Nikon D60 Tamron SP 90MM f/2.8 AF Macro 90mm (135 equiv)
The leaves of Coreopsis tripteris have 3 narrow leaflets. The petioles of the opposite leaves join to surround the stem.
Click on the photo for a larger image
Site: Walker County, GA Date: 2010-August-21	Photographer: Gerald C Williamson Nikon D60 Tamron SP 90MM f/2.8 AF Macro
Inflorescence of Coreopsis tripteris are near the top of the tall plant.
Click on the photo for a larger image

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Coreopsis tripteris initially published on USWildflowers.com 2010-08-23; Updated 2015-06-24

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2025
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Code Update 20230302