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*Iris pseudacorus Linnaeus. clade: Limniris. 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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image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Sonnia Hill | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷

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Horticultural Information

NCBG trait

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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