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Xanthosoma stergiosii Croat & Delannay

Introduction & Overview

Common and Scientific Names

  • Scientific Name: Xanthosoma stergiosii Croat & Delannay
  • Common Name: No widely recognized common names

Quick Facts

  • Origin: Native to Venezuela
  • Features: Broad, arrowhead-shaped leaves

Taxonomy & Classification

  • Genus: Xanthosoma
  • Botanical Background: Described by Thomas B. Croat and Félix Delannay, the species name honors Basil Stergios, a Venezuelan botanist known for his work on regional flora.

Natural Habitat & Distribution

  • Geographical Range: Endemic to Venezuela
  • Environment: Grows in humid, tropical environments with high annual rainfall, rich organic soils, and shaded understory conditions.

Morphological Characteristics

Leaves

  • Large, sagittate (arrow-shaped) leaves with smooth margins and a rich green surface
  • Petioles are robust and may have a subtle bluish hue

Inflorescence (Spadix & Spathe)

  • Inflorescence includes a cylindrical spadix enclosed by a moderately sized, pale green to white spathe
  • Pollination is likely insect-mediated

Growth Habit

  • Terrestrial plant with tuberous rhizomes
  • Forms clumps and grows well in forest floor conditions

Cultivation & Care

Light Requirements

  • Bright, indirect light
  • Tolerates low light but thrives best with consistent, soft lighting

Watering & Humidity

  • Keep soil moist but not waterlogged
  • Requires high humidity (above 60%) to maintain leaf health and vigor

Soil & Potting Mix

  • Use a rich, well-draining mix containing loam, compost, bark, and perlite
  • Medium should retain moisture while offering adequate drainage

Temperature & Fertilizer

  • Optimal temperatures range from 20–28°C (68–82°F)
  • Feed with a balanced liquid fertilizer monthly during active growth

Propagation Methods

Division

  • Propagation is typically done by dividing tubers or rhizomes
  • Ensuring each piece contains viable buds


Seeds

  • Propagation is possible but uncommon
  • Require warm, humid conditions for germination

Common Pests & Diseases

Typical Issues

  • Spider mites, mealybugs, and root rot if overwatered
  • Good airflow and routine inspection help prevent outbreaks

Treatment Recommendations

  • Use neem oil or insecticidal soap for pest management
  • Ensure well-draining soil and avoid overwatering to prevent rot

Notable Traits & Uses

  • Commemorates botanist Basil Stergios, who contributed significantly to plant studies in Venezuela’s Andean and tropical regions
  • Due to its rarity and attractive foliage,
  • Not widely cultivated or available

Conservation & Availability

Wild Population Status

  • Not currently assessed by the IUCN
  • Habitat may be at risk due to deforestation and environmental change

Market Availability

  • Extremely rare in cultivation
  • Found in botanical collections or as part of conservation-based propagation efforts

References & Resources

Further Reading

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