Yellow Iris - Iris pseudacorus

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Alternative names

Yellow Flag

Description

Stout, medium to tall tufted, rhizomatous plant. Leaves long, sword shaped, 10 to 30 mm wide, with a conspicuous raised mid-rib, slightly grey-green. Flowers 4 to 12 yellow, 70 to 100 mm the broad oval falls, veined and dotted with green.

Identification difficulty

Habitat

Freshwater margins.

When to see it

June to August.

Life History

Perennial.

UK Status

Quite common throughout Britain.

VC55 Status

Fairly frequent in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 166 of the 617 tetrads.

Graham Calow
Wash Pit, Sapcote
14 June 2006
Graham Calow
Maynes Lakes, Stoke Golding
01 June 2017
var. bastardii
David Nicholls
Thornton Reservoir
05 June 2012
Graham Calow
Frolesworth
01 June 2015
Lostash
Whetstone Garden 154
28 June 2013
David Nicholls
Watermead
27 September 2013
seed pods

Leicestershire & Rutland Map

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MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species data profile ?

Species profile

Common names: Yellow Flag, Flag Iris, Yellow Iris
Species group:: flowering plant
Kingdom:: Plantae
Order:: Asparagales
Family:: Iridaceae
Records on NatureSpot:: 356
First record:: 21/06/2001 (Jane McPhail;John Kramer)
Last record:: 14/05/2026 (Hollingworth, Jane)

Total records by month

% of records within its species group

10km squares with records

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