• Scientific name: Marsilea quadrifolia
• Common name: European waterclover
• Family: Marsileaceae
• Group: Aquarium plants
• Max height: 6-10 cm
• Distribution: South Europe, Central and South Asia
• Habitat: Shallow waters
• Substrate: Prefers sandy and loamy soils
• Placement in aquarium: Foreground
• Lighting needs: Low to medium
• Temperature: 15-20°C
• pH: 5-7,5
• Hardness: 4-12NK°

Description: Marsilea quadrifolia has a long creeping rhizome from which leaves similar to a four-leaf clover develop in two rows. In the aquarium this species should be cultivated in sand and in the shade. Only in this way will it prosper under water, the petioles growing to a length of 10 to 15 cm. It normally seems to be unfussy as to light and water conditions, and doesn't need a rich substrate. In bright situations the petioles become elongated and the leaves reach the surface and emerge from the water. It is less suitable for paludariums and terrariums as in these situations the plant develops petioles that are up to 20 cm long and become prostrate.