1. Sunflower of eastern North America having narrow leaves and found in bogs
   - swamp sunflower

Type of: helianthus, sunflower

• family Cynoglossidae
• family Cyperaceae
• family Cypraeidae
• family Cyprinidae
• family Cyprinodontidae
• family Cyrilliaceae
• family Dacninae
• family Dacrymycetaceae
• family Dactylopiidae
• family Dactylopteridae
• family Dactyloscopidae
• family Danaidae
• family Dasyatidae
• family Dasypodidae
• family Dasyproctidae
• family Dasyuridae
• family Dasyurinae
• family Daubentoniidae
• family Davalliaceae
• family Delphinidae
• family Dematiaceae
• family Dendrocolaptidae
• family Dennstaedtiaceae
• family Dermestidae
• family Dermochelyidae