| Scientific Name: | Polygonum aviculare |
| Common Name: | prostrate knotweed |
| Family Name: | Polygonaceae |
| Origin: | Europe, North America |
| Hardiness Zone: | Zone 5: (-29 to -23 °C) |
| Plant Type: | Annual (true), Weed (horticultural) |
| Mature Size: | < 0.1m x 0.3 - 0.6m (height x width) |
| Habit: | Horizontal |
| Form: | Creeping / Mat-like |
| Texture: | Fine |
| Landscape Uses: | n/a |
| Exposure: | Full sun |
| Soil or Media: | Rocky or gravelly or dry |
| Leaves: | Simple, Alternate, Soft flexible, Glabrous, Elliptic, Entire |
| Flowers: | Flowers clustered, White, Pink, May-Sep |
| Fruit: | Achene, Red, Brown, Jun-Oct |
| Key ID Features: | |
| Annual herb with taproot often found emerging from concrete cracks and growing horizontally (prostrate); leaves alternate, most elliptical, 6-9(-25)mm long x 2-4(-10)mm wide; flowers axillary, 5 petals 2-3 mm long, white-pink-red; achenes 3-angled, ~3mm long. | |