Lagenandra praetermissa de Wit

• Genus: Lagenandra
• Botanical Background: Described by Dutch botanist de Wit in 1956, L. praetermissa is one of the lesser-known members of its genus, but it has intrigued botanists and horticulturists for its aquatic adaptations and unique form.

• Geographical Range: Native to Sri Lanka, Lagenandra praetermissa is found in waterlogged regions, typically near streams and swampy areas in the island's wet zone.
• Environment: Thrives in tropical conditions with high humidity and ample water. It prefers well-drained, yet moist soils, with temperatures consistently ranging from 25 to 30°C.

Leaves

• large, ovate to elliptical
• Glossy, dark green surface
• Can grow up to 30 cm in length
• With noticeable veins

Inflorescence (Spadix & Spathe)

• Produces a small, unremarkable spadix and spathe
• Inflorescence is typically white or light yellow

Growth Habit

• Primarily aquatic
• Grows in shallow water or boggy conditions

Light Requirements

• Bright, indirect light
• Can tolerate lower light

Watering & Humidity

• Consistent watering is essential
• Plant should never be allowed to dry out
• High humidity 60-80% 

Soil & Potting Mix

• A well-draining, moist potting mix
• A mix designed for aquatic plants or a standard soil with added perlite

Temperature & Fertilizer

• Temperatures (25-30°C)
• Should not be exposed to temperatures below 18°C
• Fertilize lightly with a balanced liquid fertilizer during the growing season, every 4-6 weeks

Division and Stem Cuttings

• Dividing rhizomes
• Can be carefully separated into sections, each with at least one growing bud

Seeds

• Successful germination is rare in cultivated conditions

Typical Issues

• Aphids, spider mites and mealybugs
• Root rot

Treatment Recommendations

• Insecticidal soap or neem oil
• Ensure proper drainage
• Avoid over-watering

• Not commonly used in cultural practices
• Decorative potential in water gardens and wetlands

• Ornamental value in aquatic setups
• Bold foliage and its adaptability to wetland condition

Wild Population Status

• No major conservation concerns
• Habitat destruction in its native range could potentially threaten its populations

Market Availability

• Relatively rare in cultivation
• May only be found in specialized plant nurseries or collectors' circles focused on aquatic aroids