• habit of plant in flower; Belmont Prairie Nature Preserve, DuPage County, Illinois
  
• another habit image; Braidwood Dunes and Savanna Nature Preserve, Will County, Illinois
  
• tip of stems and leaves; Don Gardner Prairie Restoration, Ford County, Illinois
  
• tip of stems and leaves; Don Gardner Prairie Restoration, Ford County, Illinois
  
• inflorescence; Denby Prairie Nature Preserve, Macoupin County, Illinois
  
• another inflorescence; same locality
  
• one more inflorescence; Sand Ridge State Forest, Mason County, Illinois
  
• closeup of inflorescence; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• habit of plants in fruit; Nachusa Grassland, Lee County, Illinois
  
• closeup of fruits; same locality
  
• macro of fruiting heads; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habit of plant; Nachusa Grassland, Lee County, Illinois
  
• another habit of plant in flower; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat in sand dune blowout at Henry Allan Gleason Nature Preserve, Mason County, Illinois; Henry Allan Gleason Nature Preserve, Mason County, Illinois
  
• habit of plant in flower; same locality
  
• closeup of inflorescence; same locality
  
• macro of inflorescence; same locality
  
• macro of flower in side view; same locality
  
• flower in longitudinal section; same locality
  
• closeup of developing fruits; same locality
  
• fruits and seeds; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habit of plant in flower; Braidwood Dunes and Savanna Nature Preserve, Will County, Illinois
  
• another plant in flower; Bluff Springs Fen Nature Preserve, Cook County, Illinois
  
• flower heads with Monarch butterfly; Gensburg-Markham Prairie Nature Preserve, Cook County, Illinois
  
• inflorescence with flower heads; Weston Cemetery Prairie Nature Preserve, McLean County, Illinois
  
• closeup of flower heads from the front; railroad prairie south of Loda, Iroquois County, Illinois
  
• closeup of flowerheads from side; same locality
  
• longitudinal section of flower head; same locality
  
• habit of plant in fruit; Pembroke Sand Prairie, Kankakee County, Illinois
  
• fruiting heads on stalk; railroad prairie south of Loda, Iroquois County, Illinois
  
• macro of fruiting head; same locallity
  
• achenes; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat; sand prairie, Illinois Beach State Park, Lake Co., Illinois
  
• habit of plant in flower; Shoe Factory Road Prairie Nature Preserve, Cook County, Illinois
  
• another plant in flower; North Dunes Nature Preserve, Lake County, Illinois
  
• flower heads in an inflorescence; Harlem Hills Nature Preserve, Winnebago County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat of plants in prairie; Boyd Prairie, east of Baldwin City, Douglas County, Kansas — These plants were growing in the wagon tracks of the old Sante Fe Trail <http://history.cc.ukans.edu/heritage/prairie_preserve/boyd.html>
  
• plant in flower; Faulkner-Franke Pioneer Railroad Prairie Nature Preserve (Desoto Prairie), Jackson County, Illinois
  
• closeup of inflorescence; same locality — note the hairy stem
  
• macro of one flower head
  
• macro of one individual flower
  
• habit of plant in fruit; Loda Cemetery Prairie Nature Preserve, Iroquois County, Illinois
  
• flower heads in an inflorescence in fruit
  
• macro of fruiting heads; same locality
  
• achenes or "seeds"; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• plant in flower; Site "M"/Panther Creek, Cass Co., Illinois
  
• inflorescence in fruit with numerous fruit heads; same locality
  
• macro of young and mature fruit heads; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat of plants
  
• habit of plant in flower
  
• inflorescence — note that the stems do NOT have any hairs
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat of plant; Gensburg-Markham Prairie Nature Preserve, Cook County, Illinois
  
• habit of plant in flower; Foley Sand Prairie Nature Preserve, Lee County, Illinois
  
• inflorescence; Gensburg-Markham Prairie Nature Preserve, Cook County, Illinois
  
• two flowers; same locality
  
• flower with butterfly; same locality
  
• flower with Aphrodite fritillary; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat of plants
  
• inflorescences
  
• habit of plant in fruit
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat of plant in prairie
  
• habitat of plant in prairie; Don Gardner Prairie Restoration, Ford County, Illinois
  
• habit of plant in flower
  
• closer view of plant
  
• habit of plant in prairie; Don Gardner Prairie Restoration, Ford County, Illinois
  
• habit of plant in prairie; Don Gardner Prairie Restoration, Ford County, Illinois
  
• leaves on young fruit branch; Don Gardner Prairie Restoration, Ford County, Illinois
  
• flowers with swallowtail butterfly; Don Gardner Prairie Restoration, Ford County, Illinois
  
• flowers with swallowtail butterfly; Don Gardner Prairie Restoration, Ford County, Illinois
  
• macro of inflorescence — this aesthetically pleasing inflorescence is called a "helicoid cyme"
  
• macro of flowrs in longitudinal section
  
• heterostyly — there are two types of flowers in this species, long-styled and short-styled, each type found different plants. This is a type of plant breeding system called "heterostyly." For more on plant breeding sytems, see this unit in Digital Flowers
  
• young fruit branch; Don Gardner Prairie Restoration, Ford County, Illinois
  
• young fruit branch; Don Gardner Prairie Restoration, Ford County, Illinois
  
• detail of young fruit branch; the yellow arrows point to the 4 lobes of an ovary with a gynobasic style, with each lobe developing into a nutlet. Often, only lobe of an ovary develops into a mature fruit. Don Gardner Prairie Restoration, Ford County, Illinois
  
• fruits
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habitat in sand prairie at Illinois Beach State Park
  
• habit of plant in flower at Braidwood Sand Savanna, Will County, Illinois
  
• closer view of plant in flower
  
• closeup of flowers with small beetles; these are short-styled flowers as you can see the anthers just inside the opening in the center of the flower
  
• closeup of long-styled flowers; the round stigma is visible in the center of the flower
  
• fruiting structure with small, hard, white nutlets along the branches
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habit of plant in flower at Revis Hill Prairie, Mason County, Illinois
  
• plant with large rootstock
  
• closeup of inflorescence
  
• closeup of flowers
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• habit of plant in flower; Chiwakee Prairie, Kenosha Cunty, Wisconsin
  
• palmately compound leaves; Green Lake Savanna, Cook County, Illinois
  
• inflorescence; Chiwakee Prairie, Kenosha Cunty, Wisconsin
  
• macro of flowers; Braidwood Dunes and Savanna Nature Preserve, Will County, Illinois
  
• fruits; Green Lake Savanna, Cook County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

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