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IRIS SHREVEI | Blue Flag Iris

  • Blue Flag Iris
  • Blue Flag Iris Wildflower
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Product Description

Blue Flag Iris (Iris Shrevei) - Iris is from the Greek word for "rainbow" and shrevei is in honor of Ralph Shreve.

Commonly found in the marshy areas of the Tallgrass prairie, I. shrevei blooms from May to June and can grow to 4 feet under ideal conditions, but 2 - 3 feet is the norm. The flowers of this species are only found in the wild as blue to blue-violet; other colored irises growing in what appears to be wild conditions are garden escapes.


Sun Exposure               Prairie, Savanna
Soil Moisture Wet, Wet Mesic
Bloom Time Summer
  May, June
Bloom Color Blue
Max Height 3 feet
Wetland Code OBL
Germ Code  C(120) or M
Seeds Per Packet  50
Seeds Per Ounce   1000


Native Americans used Blue Flag Iris to treat earaches, sore eyes, respiratory problems and liver ailments. Both Native Americans and early settlers pounded the boiled roots into a pulp and applied it as a dressing to relieve pain and swelling from sores and bruises. Early settlers also used I. shrevei occasionally to induce vomiting in order to "cleanse the intestines".

Edible Uses: Unknown

Medicinal Uses: Blue Flag contains an acrid resin with acts of the gastrointestinal tract, liver and pancreas and may cause dermatitis in some people. Large doses of Blue Flag can cause vomiting. Do not use Blue Flag while pregnant.

Herbal Uses: Unknown

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