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Spirodela punctata (G.Mey.) C.H.Thomps.

Introduction & Overview

Common and Scientific Names

  • Scientific Name: Spirodela punctata (G.Mey.) C.H.Thomps.
  • Common Name: Spotted duckweed

Quick Facts

  • Origin: Tropical and temperate regions
  • Features: Tiny, speckled fronds and high reproductive rate, making it a common sight in still or slow-moving water bodies

Taxonomy & Classification

  • Genus: Spirodela
  • Botanical Background: Described by early botanists and later revised by C.H.Thompson, the species has been integral to studies on aquatic plant adaptation and nutrient uptake in freshwater ecosystems.

Natural Habitat & Distribution

  • Geographical Range: Indigenous to various regions including parts of Asia, Africa, and the Americas
  • Environment: Naturally grows in nutrient-rich, still waters such as ponds, lakes, and slow-flowing rivers, preferring environments with high humidity and soft, organic-rich substrates.

Morphological Characteristics

Leaves

  • Small, oval to rounded with a distinct spotted pattern
  • Smooth texture and a bright green hue

Inflorescence (Spadix & Spathe)

  • Flowering is rare
  • Inconspicuous spathes and spadices that support wind or water-mediated pollination

Growth Habit

  • Aquatic, free-floating plant
  • Budding off new fronds from its rhizoid system rather than forming extensive root structures.

Cultivation & Care

Light Requirements

  • Bright, indirect light, although it can tolerate partial shade
  • Excessive direct sunlight should be avoided to prevent overheating of water

Watering & Humidity

  • Moist environment with clean, dechlorinated water
  • Regular water changes help maintain nutrient balance

Soil & Potting Mix

  • Shallow containers or ponds with a fine, organic-rich substrate at the bottom to support any minimal root structures

Temperature & Fertilizer

  • Ideal temperatures range from 20°C to 30°C
  • Diluted, balanced aquatic fertilizer applied monthly

Propagation Methods

Division and Cuttings

  • Natural frond division; as new fronds bud off from the parent, they can be separated and relocated to new water bodies


Seeds

  • Seed production is uncommon, as vegetative propagation is the predominant method for this species

Common Pests & Diseases

Typical Issues

  • Fungal infections or algal overgrowth if water quality is poor

Treatment Recommendations

  • Employing organic fungicides and ensuring proper nutrient balance in the water
  • Physical removal of excessive algae may also be necessary

Notable Traits & Uses

  • Significant role in freshwater ecosystems by absorbing excess nutrients.
  • Ease of propagation and its utility in small water gardens or aquaria, contributing to a balanced aquatic environment.

Conservation & Availability

Wild Population Status

  • Not currently endangered, its populations can be affected by water pollution and habitat disruption

Market Availability

  • Widely available through specialized aquatic plant suppliers

References & Resources

Further Reading

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