*Iris pseudacorus Linnaeus. Common name: Water Flag, Yellow Flag, Fleur-de-Lys, Yellow Iris. Phenology: Late Mar-Jul; late Jun-Oct. Habitat: Swamps, marshes, streams, ponds, streambanks, tidal wetlands, cultivated as a water plant. Distribution: Native of Eurasia and n. Africa.
Origin/Endemic status: Eurasia
Synonymy ⓘ: = AqW, Ar, C, Can, ETx1, F, FNA26, G, GW1, Il, K4, Mi, Mo1, NcTx, NE, NY, Pa, RAB, S, Tat, Tn, Tx, Va, W, WH3, WV; = Limniris pseudacorus (L.) Fuss — Crespo, Martínez-Azorín, & Mavrodiev (2015). Basionym: Iris pseudacorus L. 1753
Links to other floras: = Iris pseudacorus - FNA26
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: OBL
- Eastern Mountains and Piedmont: OBL
- Great Plains: OBL
- Midwest: OBL
- Northcentral & Northeast: OBL
Heliophily ⓘ: 8
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© Bruce A. Sorrie | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Scott Ward | Original Image ⭷
© Sonnia Hill | Original Image ⭷
© Scott Ward | Original Image ⭷
© Scott Ward | Original Image ⭷
© Gary P. Fleming | Original Image ⭷Feedback
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Horticultural Information
Intro: Erect, rhizomatous perennial that typically forms large colonies in swamps, marshes, streams, pond edges, stream banks and tidal wetlands. Native of Eurasia and Africa.
Stems: Stems consist of crowded rhizomes at soil surface; a stiff flowering stalk, with leaves clustered at the base, arises from rhizome.
Leaves: Leaves crowded at base of plant, linear-lance-shaped and stiff, to 3 ft. long and 1 in. wide, dark green, smooth.
Inforescence:
Flowers: Flowers 4-12, produced toward top of stalk from nodes underlain by bracts; bright yellow; 3-4 in. wide, consisting of 3 ornate, drooping, petal-like sepals bearing brown and violet lines and 3 erect, unmarked petals.
Fruits:
Comments: Cultivated as a water plant and widely naturalized; invasive in places.
Height: 3-4 ft.
plant sale text:
bloom table text:
description: Erect, rhizomatous perennial that typically forms large colonies in swamps, marshes, streams, pond edges, stream banks and tidal wetlands. Native of Eurasia and Africa.
stems: Stems consist of crowded rhizomes at soil surface; a stiff flowering stalk, with leaves clustered at the base, arises from rhizome.
leaves: Leaves crowded at base of plant, linear-lance-shaped and stiff, to 3 ft. long and 1 in. wide, dark green, smooth.
inflorescence:
flowers: Flowers 4-12, produced toward top of stalk from nodes underlain by bracts; bright yellow; 3-4 in. wide, consisting of 3 ornate, drooping, petal-like sepals bearing brown and violet lines and 3 erect, unmarked petals.
fruits:
comments: Cultivated as a water plant and widely naturalized; invasive in places.
cultural notes:
germination code:
native range: Europe to western Asia & n. Africa
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