Native & Naturalized Plants of the Carolinas & Georgia


763

Forb
Perennial

Non-native: Eurasia & Africa
Documented growing wild in GA NC SC

Uncommon

Look for it in swamps, marshes, streams, ponds, streambanks, cultivated as a water plant, per Weakley's Flora

map
To see a detailed map, click here


INVASIVE

This plant is causing problems in natural areas outside its native range, according to authorities such as:

Brooklyn Botanic Garden
Kentucky Exotic Pest Plant Council, 2013
Tennessee Exotic Pest Plant Council, 2009
Virginia Department of Conservation and Recreation, 2014

 

...Wet

LEAVES:
Simple

FLOWER:
Spring/Summer
Yellow/Cream
Bisexual
Radially symmetrical
3 sepals
3 petals
3 stamens
Inferior ovary

FRUIT:
Summer/Fall
Capsule

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Asparagales

WEAKLEY'S FLORA (11/30/12):
Iris pseudacorus   FAMILY Iridaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Iris pseudacorus   FAMILY Iridaceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (1968) 046-05-005:
Iris pseudacorus   FAMILY Iridaceae

 

COMMON NAME:
Yellow Flag, Water Flag


Click or hover over the thumbnails to see larger pictures.

image of Iris pseudacorus

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_irps_001_lvd

        

image of Iris pseudacorus

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_irps_008_lvd

        

image of Iris pseudacorus

Rob Hunnings    rlh_10411C

May    Greenville County    SC

Lake Conestee Nature Park

The only completely yellow, large, wild iris in North america, per Invasive Plants, Guide to Identification, Impacts and Control.

image of Iris pseudacorus

Rob Hunnings    rlh_10415

May    Greenville County    SC

Lake Conestee Nature Park

image of Iris pseudacorus

Rob Hunnings    rlh_10417

May    Greenville County    SC

Lake Conestee Nature Park

image of Iris pseudacorus

Rob Hunnings    rlh_10532C

May    Greenville County    SC

Lake Conestee Nature Park

Once established, can form dense clumps that exclude other wetland species, per Invasive Plants, Guide to Identification, Impacts and Control.

image of Iris pseudacorus

Rob Hunnings    rlh_10537

May    Greenville County    SC

Lake Conestee Nature Park

The 3 drooping, deep yellow sepals are marked with purple-brown, per Invasive Plants, Guide to Identification, Impacts and Control.

image of Iris pseudacorus

Rob Hunnings    rlh_10544

May    Greenville County    SC

Lake Conestee Nature Park

The 3 narrow petal-like sections are flattened branches of the style, per The Monthly Illustrator, Vol 4 (Jones, 1895).

image of Iris pseudacorus

Rob Hunnings    rlh_10547

May    Greenville County    SC

Lake Conestee Nature Park

Sword-like flattened leaves (3/4" wide to 3' long) arise in a fan from base, per Invasive Plants, Guide to Identification, Impacts and Control.

image of Iris pseudacorus

Patrick D. McMillan    pdmipseudacorus_lvl

June    Avery County    NC

3 short erect petals, and 3 sepals with broad rounded down-curved tips, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.