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Lagenandra praetermissa de Wit

Introduction & Overview

Common and Scientific Names

  • Scientific Name: Lagenandra praetermissa de Wit
  • Common Name: No widely accepted common name

Quick Facts

  • Origin: Native to Sri Lanka
  • Features: Often found in wetlands and along watercourses. It features broad, green leaves with a glossy appearance and can grow up to 1 meter in height

Taxonomy & Classification

  • 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.

Natural Habitat & Distribution

  • 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.

Morphological Characteristics

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

Cultivation & Care

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

Propagation Methods

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

Common Pests & Diseases

Typical Issues

  • Aphids, spider mites and mealybugs
  • Root rot

Treatment Recommendations

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

Notable Traits & Uses

  • 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

Conservation & Availability

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

References & Resources

Further Reading

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