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Iris virginica var. shrevei
Iris virginica L. var. shrevei (Small) E.S. Anderson
Shreve's iris, Virginia iris, Southern blue flag, Blue flag
Synonym(s): Iris shrevei, Iris versicolor var. blandescens, Iris versicolor var. shrevei
USDA Symbol: irvis
USDA Native Status: L48 (N), CAN (N)
The narrow, sword-shaped leaves of blueflag iris may grow 3 ft. in length. They are erect with a slight, graceful curve. The flowering stalk is occasionally branched and is topped by blue-violet flowers resembling those of a cultivated iris.
A member of the iris family (family Iridaceae) which consists of herbs growing from rhizomes, bulbs, or corms, with narrow basal leaves and showy clusters at the tips of long stalks. There are about 60 genera and 1,500 species, distributed in temperate and tropical regions. Among them, Iris, Freesia, Gladiolus, Bugle Lily, and Montbretia are popular ornamentals. Saffron dye is obtained from Crocus, and essence of violets, used in perfumes, is extracted from the rhizomes of Iris.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Blue , Purple
Bloom Time: May
, WV Native Distribution:
Ont., w. NY,
w. to s. MN,
extreme n.e. KS
& OK Native Habitat:
Marshes; swamps; meadows
Growing ConditionsLight Requirement: Sun
Soil Moisture: Wet
Soil Description: Moist to saturated soils.
Conditions Comments: Southern Blue Flag Iris prefers moist, rich soil where it forms colonies. It can also be used in bog or water gardens planted 18-24 inches apart.
Good cut flower Warning:
Some Iris species are known to be poisonous to humans and animals if eaten (especially the rhizome,
or root), and it is likely that all irises contain toxins. Plant juices can cause blisters on the skin. Sensitivity to a toxin varies with a personís age, weight, physical condition, and individual susceptibility. Children are most vulnerable because of their curiosity and small size. Toxicity can vary in a plant according to season, the plantís different parts, and its stage of growth; and plants can absorb toxic substances, such as herbicides, pesticides, and pollutants from the water, air, and soil. Conspicuous Flowers:
Record Last Modified: 2012-10-03
Research By: NPC