| Scientific Name: | Lythrum salicaria |
| Common Name: | purple loosestrife |
| Family Name: | Lythraceae |
| Origin: | Central / west Asia, Europe, South Asia / India |
| Hardiness Zone: | Zone 4: (-34 to -29 °C) |
| Plant Type: | Herbaceous perennial, Invasive plant, Weed (horticultural) |
| Mature Size: | 1.3 - 2.0m x 0.3 - 0.6m (height x width) |
| Habit: | Upright |
| Form: | Oval - vertical |
| Texture: | Medium - fine |
| Landscape Uses: | Wetland - bogs |
| Exposure: | Full sun, Part sun/part shade |
| Soil or Media: | Acidic, Bog, Humus rich |
| Leaves: | Simple, Opposite, Soft flexible, Pinnate venation, Pubescent, Lanceolate, Oblong, Entire |
| Flowers: | Raceme, Purple, Pink, Magenta, Jul-Aug-Sep |
| Fruit: | Capsule, Brown, Aug-Sep-Oct |
| Key ID Features: | |
| Leaves sessile, most opposite (or less commonly in whorls of three), lanceolate, most 8-13cm long x 2-4cm wide, pubescent (downy); flowers ~2cm wide, 5 petals, pink-magenta, in dense terminal spikes (9-)15-35(-45)cm long, Jul-Sep; capsules 4mm long x 1.5mm wide. | |