Wolffiella rotunda Landolt

• Genus: Wolffiella
• Botanical Background: Described by Landolt, this species has been the subject of various taxonomic revisions as botanists have deepened their understanding of aquatic plant evolution and phylogenetics

• Geographical Range: Found in still or slow-moving freshwater systems, including ponds, marshes, and lakes in temperate regions
• Environment: Thrives in nutrient-rich, calm waters where moderate sunlight and stable temperatures foster its rapid vegetative spread

Leaves

• Very small
• Circular leaves 
• Smooth, glossy appearance 

Inflorescence (Spadix & Spathe)

• Due to its diminutive size, the inflorescence is highly reduced
• Tiny, self-pollinating flowers that are not the plant’s primary attraction

Growth Habit

• Floats freely on the water surface
• Forming dense colonies through continuous vegetative budding

Light Requirements

• Bright, indirect light, similar to conditions found in natural freshwater habitats

Watering & Humidity

• Requires a constant water environment with good circulation to avoid stagnation and ensure oxygenation

Soil & Potting Mix

• No traditional substrate is needed
• If cultivated in a pond or aquarium, a thin layer of sediment can provide additional nutrients

Temperature & Fertilizer

• Ideal water temperatures range from 15 to 25°C
• Occasional diluted liquid fertilizer can support healthy growth, but over-fertilization should be avoided

Division and Cuttings

• Primarily occurs through vegetative division, with new fronds budding from the parent plant, allowing rapid colony expansion

Seeds

• Rare in this species and is not typically used as a propagation method

Typical Issues

• Occasionally suffer from waterborne fungal infections in stagnant conditions

Treatment Recommendations

• Maintaining water circulation and a balanced nutrient profile is key
• Organic treatments and careful water quality management are recommended if issues arise

• Diminutive, rounded fronds and rapid growth make it a useful indicator of water quality
• Its ability to quickly cover a water surface adds a natural, textured element to ponds and aquaria

• Popular subject for studies on aquatic plant biology

Wild Population Status

• Not considered threatened and is commonly found in its natural freshwater habitats

Market Availability

• Not considered threatened and is commonly found in its natural freshwater habitats