| Family Name: | Aponogetonaceae (water hawthorn family) |
| Scientific Name: | Aponogeton rigidifolius |
| Common Name: | None |
| Substrate: | Plain washed gravel |
| Lighting: | Bright; 50 watts per 25 gallons (100 L) |
| pH value: | 5.5-6.5 |
| Hardness: | 1-3odCH |
| Temperature: | 72-82oF (22-28oC) |
| Height: | 24 in (60 cm) |
| Distribution: | Sri Lanka |
| Characteristics: | Leaves stemmed, stiffly erect, slightly brittle, rough and hard; dark green to olive brown. |
| Aquarium use: | Background, singly, ideally in large aquariums. |
