• habit of plant in flower; Schulenberg Prairie Restoration, Morton Arboretum, DuPage County, Illinois
  
• leaves; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habitat on hill prairie; Cap au Gris Hill Prairie, Calhoun County, Illinois
  
• habit of plant in flower, blacksoil prairie; Loda Cemetery Prairie Nature Preserve, Iroquois County, Illinois
  
• inflorescence; Chicago Botanic Garden, prairie restoration, Cook County, Illinois
  
• another inflorescence; Long Run Seep Nature Preserve, Will County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habitat along the beach at Illinois Beach State Park
  
• 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
  
• flower; same locality
  
• No map is available for this species in Illinois

• habit of plant in flower; Illinois Beach State Park, Lake Co., Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habitat; Schulenberg Prairie Restoration, Morton Arboretum, DuPage County, Illinois
  
• habit of plant in flower; Tomlinson Cemetery Prairie Nature Preserve, Champaign County, Illinois
  
• another view of a plant in flower; Schulenberg Prairie Restoration, Morton Arboretum, DuPage County, Illinois
  
• inflorescence; Tomlinson Cemetery Prairie Nature Preserve, Champaign County, Illinois
  
• another inflorescence; Tomlinson Cemetery Prairie Nature Preserve, Champaign County, Illinois
  
• flowers; Schulenberg Prairie Restoration, Morton Arboretum, DuPage County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit
  
• leaves (bipinnately compound); railroad prairie remnant south of Loda, Iroquois County, Illinois
  
• nectar glands near base of leaf stalk
  
• habit, note different right- and left-hand flowers (look for the "cupped" petal"); Tomlinson Cemetery Prairie Nature Preserve, Champaign County, Illinois
  
• inflorescences; railroad prairie remnant south of Loda, Iroquois County, Illinois
  
• flower in longitudinal section
  
• habit of plant in fruit; Quiver Sand Prairies, Sand Ridge State Park, Mason County, Illinois
  
• seeds wth tiny pits arranged in rows
  By Bill Fries & Chip Davis href="http://www.fs.fed.us/ne/delaware/ilpin/686.gif">distribution map in Illinois from the Illinois Plant Information Network

• Numerous clumbs at the Savanna Army Depot
  
• One clump; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plant with typical red bracts — the bracts are modified leaves that are at the base of the flowers the flowers; ; Gavin Bog and Prairie Nature Preserve, Lake County, Illinois
  
• habit of plant with unusual orange-yellow bracts; Illinois Beach State Park, south of Dead River, Lake County, Illinois
  
• inflorescence showing the brilliant red bracts
  
• Closeup of red and yellow bracts with a flower enclosed within each set of bracts; Site "M"/Panther Creek, Cass Co., Illinois
  
• detail of bract and flowers
• flowers enclosed by colorful bracts
  
• flower in longitudinal section
  
• flowers in longitudinal section, labeled
  
• seeds highly magnified
  
• one seed viewed with a scanning electron microscope
  
• a higher magnification of the layered, honeycomb-like seed coat, taken with a scanning electron microscope
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habitat; sand prairie at Illinois Beach State Park, growing with Coreopsis lanceolata, sand coreopsis
  
• habit of plant in flower, same locality
  
• another plant in flower; same locality
  
• inflorescence; Freeport Prairie Nature Preserve, Stephenson County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habitat; Foley Sand Prairie Nature Preserve, Lee County, Illinois
  
• habit of plant in flower; Ayres Sand Prairie Nature Preserve, Carroll County, Illinois
  
• Closeup of leaves and one inflorescence; cultivated at the Illinois Natural History Survey, Champaign, Illinois
  
• branch with leaves spread out flat; cultivated at the Illinois Natural History Survey, Champaign, Illinois
  
• upper and lower surfaces of leaves' cultivated at the Illinois Natural History Survey, Champaign, Illinois
  
• edge of leaf showing teeth along margin; cultivated at the Illinois Natural History Survey, Champaign, Illinois
  
• macro of lower surface of leaf showing hairs; cultivated at the Illinois Natural History Survey, Champaign, Illinois
  
• inflorescence; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• inflorescences and leaves; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• many inflorescences; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• Closeup of flowers
  
• macro of flowers
  
• young fruits on plant
  
• Closeup of young fruits; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• mature fruits on plant; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• Closeup of fruits; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plant in flower; Savanna Army Depot /Lost Mound area, Jo Daviess County, Illinois
  
• closer view of plant; same locality
  
• plant with young fruits; Illinois Beach State Park, Lake Co., Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habitat, fen at Nachusa Grassland, Ogle County, Illinois; locality
  
• habit of plant and leaves; fen at Nachusa Grassland, Ogle County, Illinois
  
• inflorescence; New Hampshire
  
• flowers; New Hampshire
  
• habit; locality
  
• habit; locality
  

• habit of plant in sand prairie; south of Amboy, Lee County, Illinois
  
• habit of plant in flower; Matanzas Prairie Nature Preserve, Mason County, Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

• typical plant along a roadside
  ; Route 45 south of Paxton, Ford County, Illinois
• habit of plant in flower, growing with Queen Anne's Lace Daucus carota; Site "M"/Panther Creek, Cass Co., Illinois
  
• Closeup of one flower head, which only contains ray flowers; roadside, Champaign County, Illinois
  
• macro of flower head
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plants in flower; vacant lot, Champaign, Illinois
  
• prickly, pinnately lobed leaf; same locality
  
• leaves from different parts of a plant; same locality
  
• cluster of flower heads; same locality
  
• closer view of cluster of flower heads; same locality
  
• Closeup of 3 flower heads, the central one open; same locality
  
• macro of one flower head; same locality
  
• longitudinal section of one flower head; each head is composed of many disk flowers; same locality
  
• macro of 3 flower heads, the central one beginning to set fruit; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plant in flower; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• prickly, pinnately lobed leaves — note the white lower surface; same locality
  
• several flower heads; same locality
  
• flower head with spicebush swallowtail butterfly; same locality
  
• macro of one flower head; same locality
  
• flower head in longitudinal section; same locality
  
• fruiting heads; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Cirsium hillii or Cirsium pumilum (Hill's or prairie thistle) [Asteraceae or Compositae, Sunflower Family]

• habitat of plant on hill prairie, with scurf pea Psoralea tenuifolia; Site "M"/Panther Creek, Cass Co., Illinois
  
• Nachusa Grassland, Lee County, Illinois
  
• leaves of first year plants forming a rosette; Site "M"/Panther Creek, Cass Co., Illinois
  
• Closeup of flower head; Site "M"/Panther Creek, Cass Co., Illinois
  
• flower head in longitudinal section; Site "M"/Panther Creek, Cass Co., Illinois
  
• head in fruit; Site "M"/Panther Creek, Cass Co., Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Cirsium muticum (swamp or fen thistle) [Asteraceae or Compositae, Sunflower Family]

• habitat of plant; Long Run Seep Nature Preserve, Will County, Illinois
  
• flower heads, same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Claytonia virginica (spring beauty) [Portulacaceae, Purslane Family] — This is mostly a woodland plant but is found in open woodlands grading to prairie openings

• habitat — plants can carpet the ground in early spring; Lodge Park, Piatt County, Illinois
  
• macro of a single flower
  
• macro of fruit showing its structure
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Comandra umbellata (false or bastard toadflax) [Santalaceae, Sandalwood Family]

• habitat in blacksoil prairie, with downy phlox (Phlox pilosa); Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• habit of plant in flower; same locality
  
• habit early in spring, plant growing on top of a tuft of prairie dropseed Sporolobus heterolepis; same locality
  
• plant with flowers and leaves; Ford County, Illinois
  
• closeup of inflorescence and leaves
  
• macro of inflorescence — note the flower on the right is in longitudinal section
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plant in sand prairie; near Manito Prairie Nature Preserve, Tazewell County, Illinois
  
• Closeup of flower; same locality
  
• macro of flower emerging from spathe
  
• macro of flower from side, half of spathe cut away to show flower
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Conyza or Erigeron canadensis (horseweed) [Asteraceae or Compositae, Sunflower Family]

• upper part of plant showing clusters of many small flower heads; Site "M"/Panther Creek, Cass Co., Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Coreopsis lanceolata (sand coreopsis or lanceleaf tickseed) [Asteraceae or Compositae, Sunflower Family]

• habit of plant in sand prairie; Illinois Beach State Park
  
• habit of plant in sand prairie; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Coreopsis palmata (prairie coreopsis or stiff tickseed) [Asteraceae or Compositae, Sunflower Family]

• habitat of plant; Shoefactory Road Prairie Nature Preserve, Cook County, Illinois
  
• habit of plant in flower; Illinois Natural History Survey prairie restoration, Champaign, Illinois
  
• distinctive leaves; cultivated, Illinois Natural History Survey, Champaign, Illinois
  
• flower heads; Foley Sand Prairie Nature Preserve, Lee County, Illinois
  
• closer view of flower heads; Weston Cemetery Prairie Nature Preserve, McLean County, Illinois
  
• macro of individual disk and ray flowers dissected from a flower head
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Coreopsis tripteris (tall coreopsis or tall tickseed) [Asteraceae or Compositae, Sunflower Family]

• habit of plant in flower; Gensburg-Markham Prairie Nature Preserve, Cook County, Illinois
  
• Closeup of leaves; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• macro of flower head showing ray and disk flowers; cultivated at the Illinois Natural History Survey, Champaign, Illinois
  
• closer view of flower head, the disk flowers in the center
  
• clusters of flower heads that have gone to fruit
  
• closer view of fruit heads
  
• macro of fruit heads; Prospect Cemetery Prairie Nature Preserve, Ford County, Illinois
  
• individual achenes ("seeds") as they fall from the fruit heads
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

Coronilla varia (crown vetch) [Fabaceae or Leguminosae, Bean Family] — NOT native to Illinois

• habitat along interstate highway; Interstate 74 west of Champaign, Illinois
  
• inflorescence' Site "M"/Panther Creek, Cass Co., Illinois
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plant in sandy soild, note one yellow plus 2 developing fruits; Braidwood Dunes and Savanna Nature Preserve, Will County, Illinois
  
• habit of plant with more mature, bladder-like fruits; same locality
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network

• habit of plant in flower
  
• another plant in flower
  
• flower
  
• flower in longitudinal section
  
• closer view of central part of flower in longitudinal section
  
• Click here for a distribution map in Illinois from the Illinois Plant Information Network
  

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