| Scientific Name: | Iris pseudacorus |
| Common Name: | yellow flag iris |
| Family Name: | Iridaceae |
| Origin: | Africa - northern, Europe |
| Hardiness Zone: | Zone 5: (-29 to -23 °C) |
| Plant Type: | Flowering cut plant, Ground cover, Herbaceous perennial, Invasive plant |
| Mature Size: | 0.7 - 1.3m x 0.6 - 1.0m (height x width) |
| Habit: | Upright |
| Form: | Vase |
| Texture: | Medium - coarse |
| Landscape Uses: | Aquatic - ponds, Attract butterflies, Cut flower or foliage, Group or mass planting, Perennial border, Specimen plant, Spring interest, Waterside planting, Wetland - bogs |
| Exposure: | Full sun, Part sun/part shade, Filtered shade |
| Soil or Media: | Humus rich |
| Leaves: | Simple, Alternate, Basal, Leathery, Succulent, Parallel venation, Lustrous, Linear, Entire |
| Flowers: | Raceme, Yellow, May-Jun-Jul |
| Fruit: | Capsule, Brown, Aug-Sep-Oct |
| Key ID Features: | |
| Plants 120-150cm tall ariising from thick rhizomes; leaves basal and alternate, most 50-90 long x 1.5-4cm wide, fleshy at the base; flowers yellow, 7-10cm wide; capsules cylindrical 4-8(-10)cm long x 1.2-2.5cm wide. | |