Connecticut Plants
Hop Hornbeam (Ironwood)
Ostrya virginiana (P. Mill.) K. Koch
  • Family: birch (Betulaceae)
  • Habitat: woods
  • Height: up to 65 feet
  • Flower size: tiny flowers in catkins; staminate (male) catkins are 1-2 inches long and pistillate (female) catkins are 3/8 inch long
  • Flower color: yellow-green
  • Flowering time: May
  • Origin: native


The seeds of hop-hornbeam are enclosed in pale-green bracts in structures called strobili. These strobili look a bit like hops, hence the name "hop hornbeam."