prairie coreopsis

(Coreopsis palmata)

               
Conservation Status

IUCN Red List

not yet assessed

prairie coreopsis

NatureServe

N5? - Secure

SNR - Unranked

Minnesota

not listed

Nativity

Native

Occurrence

 

Habitat

Dry to moderate moisture. Prairies, meadows. Full sun.

Flowering

June to August

Flower Color

Yellow

Height

12 to 48


Identification

This is a 12 to 48 tall, erect, perennial forb that rises on usually one or more stems from a long, creeping rhizome. It sometimes forms dense colonies.

The stems are erect, unbranched, and mostly hairless or sparsely hairy at the base of the leaves. They are green with light green vertical stripes.

The leaves are opposite, broadly inversely egg-shaped in outline, 1 to 3 long, and stalkless or almost stalkless. They are distributed in 6 to 12 pairs along or more of the stem. They are usually hairless but sometimes have a few hairs on the margin near the base. The leaf blades are usually divided into 3 lobes well above the base and have the shape of a turkey foot. The lobes are sometimes lobed again, resulting in 3 to 7 (rarely to 9) ultimate lobes. The lobes are narrowly oblong, to 1½ long, and 1 16 to usually , sometimes ¼, wide. Upper leaves are sometimes unlobed.

The inflorescence is one to a few flower heads at the end of the stem and from upper leaf axils.

The flower heads are 1½ to 2½ wide on stalks to 2 long. The involucre is bell-shaped and is composed of 2 series of bracts, 8 inner bracts and 9 to 12 or more outer bractlets. The inner bracts are yellow-brown, oblong to nearly circular, ¼ to long, to 3 16 wide, and bent backward above the middle. The outer bracts are green, linear, ascending, and about ¼ long and .

There are 8 to 10 ray florets and 60 to 80 disk florets. The ray florets are yellow, to 1 long, and about wide. They are more or less rounded at the tip and may have 2 or 3 (sometimes 4) tiny teeth at the tip. The disk is to ½ wide. The disk floret is a yellow, 5-lobed corolla tube with a branched style. There is no floral scent.

The fruit is an achene that does not have a tuft of hair (pappus) attached.

 
Similar
Species

Plains coreopsis (Coreopsis tinctoria var. tinctoria) is much branched above the middle. The leaves are pinnate, bipinnate, or 3 times pinnately compound. The inner bracts on the involucre are reddish. The ray flowers have a red-brown blotch at the center and are divided at the tip into 3 lobes. The disk flowers have a dark tip causing the disk to appear dark.


Distribution Distribution Map   Sources: 2, 3, 4, 5, 7, 28.

Comments

 


Taxonomy

Family:

Asteraceae (aster)

 

Subfamily:

Asteroideae

 

Supertribe:

Helianthodae

 

Tribe:

Coreopsideae

 

Section:

Gyrophyllum

 
Synonyms

 

 
Common
Names

finger tickseed

prairie coreopsis

prairie tickseed

stiff tickseed

wedgeleaf coreopsis


 

 

 

 

 

 

Glossary

achene

A dry, one-chambered, single-seeded fruit, formed from a single carpel, with the seed attached to the membranous outer layer (wall) only by the seed stalk; the wall, formed entirely from the wall of the superior ovary, does not split open at maturity, but relies on decay or predation to release the contents.

 

axil

The upper angle where the leaf stalk meets the stem.

 

bract

Modified leaf at the base of a flower stalk or flower cluster.

 

corolla

A collective name for all of the petals of a flower.

 

involucre

A whorl of bracts beneath or surrounding a flower or flower cluster.

 

pappus

The modified calyx composed of awns, scales, bristles, or feather-like hairs in plants of the Aster family such as thistles and dandelions.

 

rhizome

A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.

       

Visitor Photos

   
Share your photo of this plant.

       
       
       
       

MinnesotaSeasons.com Photos

   

Plant

  prairie coreopsis    
       

Inflorescence

  prairie coreopsis   prairie coreopsis
       

Flower Head

  prairie coreopsis   prairie coreopsis
       

Leaves

  prairie coreopsis    
       

Early Spring

  prairie coreopsis    
       

Late Summer

  prairie coreopsis   prairie coreopsis
       
  prairie coreopsis    
       
       

 

Camera

     

Slideshows

   
  Coreopsis palmata PRAIRIE COREOPSIS
Frank Mayfield
 
  Coreopsis palmata PRAIRIE COREOPSIS  

 

slideshow

     

Visitor Videos

   
Share your video of this plant.

     
     

Other Videos

 
     
     
     
     

 

Camcorder

Last Updated:

About Us | Privacy Policy | Contact Us | © 2017 MinnesotaSeasons.com. All rights reserved.