Iris virginica

virginia blueflag, virginia iris, great blue flag, southern blueflag
Family

Iridaceae

Leaf Arrangement

alternate, basal (rosulate)

Leaf Margin

entire

Leaf Type

simple

Leaf Shape

linear, ensiform

Growth Form

forb, emergent aquatic

Flower Color

blue, pink, purple, red, white, yellow

Flower Month

April - June

Height (meters)

0.6 - 1.0

Milky Sap

No

Armed/Unarmed

Unarmed

Origin

native

Lifespan

perennial

Growing Season

Cool season


Wetland Class

OBL

Wetland Coefficient of Conservatism

7

Prairie Coefficient of Conservatism

5

Field Characters

Purple leaf base, uppermost leaf shorter than uppermost flower.

Cultural Information

Collect the capsules when they begin to turn brown (usually in July) and plant seeds immediately for best germination. Seeds stored dry in cold storage, or allowed to ripen to maturity on the plant, enter dormancy and often require 2 years to germinate. Steffen (1994) recommends cold/moist stratification to break dormancy. Plant outdoors in a moist bed in shade or semi-shade, then transplant when seedlings produce fans. Seeds should be planted approximately 1/2" deep. Stored seeds should be scarified by chipping the seed coat at hilum end (point where the seed was attached to the seed pod). Divisions of the rhizomes can be made in late summer or fall. Plant the peices of rhizome under 1/2" of soil.

Natural History

Grows in marshes, wet savannahs, pinelands, shallow water in ditches and in soggy meadows and prairies throughout Louisiana and east Texas. Occurs from Florida to Texas and north to east Virginia.

Habitat

Marshes, swamps, stream and pond margins, wet forests.