Lagenandra nairii Ramam. & Rajan

• Genus: Lagenandra
• Botanical Background: Described by Ramachandran and Rajan in the late 20th century, Lagenandra nairii has been studied for its unique adaptations to aquatic life in the tropical regions of India.

• Geographical Range: Found exclusively in Kerala, a tropical region in southern India, where it thrives in freshwater streams and riverbanks.
• Environment: Grows in regions with high humidity and temperatures typical of tropical climates. The species prefers slow-moving water with rich organic content and often thrives in shaded, damp conditions.

Leaves

• Long, lance-shaped, and glossy
• Deep green coloration
• Can grow up to 30 cm in length
• Feature smooth, slightly wavy edges

Inflorescence (Spadix & Spathe)

• White or pale green spathe and spadix
• Lacks significant fragrance

Growth Habit

• Primarily aquatic
• Grows in shallow freshwater environments
• Non-climbing, herbaceous perennial with a rhizomatous root system

Light Requirements

• Bright, indirect light
• Best placed in shaded or partially shaded location

Watering & Humidity

• Consistently moist conditions
• High humidity levels
• Best watered regularly to maintain waterlogged conditions

Soil & Potting Mix

• A well-draining aquatic soil mix
• A mixture designed for water plants, ensuring good water retention without compacting the roots

Temperature & Fertilizer

• Temperatures, ranging between 22-30°C (72-86°F)
• Fertilization can be done sparingly during the growing season with a balanced, water-soluble fertilizer

Division and Stem Cuttings

• Division of rhizomes
• Careful separation of the rhizomes in spring can yield new plants, each with a developed root system

Seeds

• Rarely used for propagation due to the plant’s slow reproductive cycle in the wild

Typical Issues

• Aphids, mealybugs and fungal infections
• Root rot

Treatment Recommendations

• Regularly inspect the plant
• Insecticidal soap or neem oil
• Ensure proper drainage
• Use fungicides when needed

• No specific cultural or folklore significance
• Considered an important species for conservation efforts in India

• Unique aquatic nature and striking, glossy foliage
• Its rarity may make it difficult to find

Wild Population Status

• Considered rare in its native range
•  Habitat loss from water pollution and damming projects

Market Availability

• Not widely available in the commercial market due to its limited geographical range and conservation status
• Can occasionally be found among specialist plant growers