Lemna obscura (Austin) Daubs

• Genus: Lemna
• Botanical Background: Described by botanist Austin and later revised by Daubs, the species has been of interest to researchers due to its unique adaptations to aquatic habitats and streamlined morphology

• Geographical Range: Native to temperate regions
• Environment: Thrives in nutrient-rich, calm waters with moderate temperatures and high humidity

Leaves

• Small, oval to elliptical fronds
• Smooth in texture and green in coloration

Inflorescence (Spadix & Spathe)

• Highly reduced and not visually striking
• Flowers are inconspicuous, and pollination primarily occurs through water-mediated dispersal rather than by attracting pollinators

Growth Habit

• Entirely aquatic, free-floating plant
• Reproduces predominantly via clonal division rather than forming extensive root systems or tubers

Light Requirements

• Best in bright, indirect light
• Direct intense sunlight should be moderated to prevent overheating of the water

Watering & Humidity

• Requires a stable, water-filled environment
• Regular water changes or a flowing system

Soil & Potting Mix

• Nutrient-enriched water body or a shallow aquatic substrate can support its growth

Temperature & Fertilizer

• Ideal temperature range falls within mild to moderate conditions
• Occasional dosing with a diluted aquatic fertilizer can support robust growth

Division

• Propagates almost exclusively through vegetative division

Stem Cuttings (if applicable)

• New fronds bud off from the parent plant, making manual division straightforward in cultivation

Seeds

• Seed production is rare and generally not relied upon for propagation

Typical Issues

• Algal overgrowth or minor infestations of water snails and other small aquatic invertebrates
• Root rot can develop in stagnant or overly nutrient-rich conditions

Treatment Recommendations

• Maintaining clean water, avoiding excessive fertilization, and ensuring proper circulation
• Manual removal of pests and a water change are typically effective

• Used as a model organism in aquatic plant studies
• Important role in natural water filtration and nutrient cycling

• Ease of maintenance and its contribution to healthy aquatic ecosystems in water gardens and aquariums

Wild Population Status

• No major conservation concerns

Market Availability

• Widely available through aquatic plant suppliers and garden centers