/home/ctbotsoc/ct-botanical-society.org/app/webroot/
Connecticut Plants
Slender Blueflag (Cube Iris)
Iris prismatica Pursh ex Ker-Gawl.

This species looks similar to the larger blueflag. They can be distinguished by the width of the leaves. Slender blueflag leaves look almost like grass (they are less than 1/4 inch wide); larger blueflag leaves are a half to one inch wide.

  • Family: iris (Iridaceae)
  • Habitat: marshes (fresh, brackish, or salt), shores, or meadows along the coast
  • Height: 1-3 feet
  • Flower size: 2.5 to 4 inches
  • Flower color: blue-purple
  • Flowering time: May to July
  • Origin: native
Iris prismatica Pursh ex Ker-Gawl.
Iris prismatica Pursh ex Ker-Gawl.

Photographed in Burlington County, New Jersey in late May.

Iris prismatica Pursh ex Ker-Gawl.

Note the developing seed capsule to the left of the flower. A capsule with sharp angles is one of the characteristics that distinguishes slender blue flag from larger blueflag, whose capsules have three rather blunt angles. Photographed in Burlington County, New Jersey in late May.