Xanthosoma stergiosii Croat & Delannay

• 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.

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

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

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

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

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

• 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

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