Xanthosoma seideliae Croat

• Genus: Xanthosoma
• Botanical Background: Described by aroid specialist Thomas B. Croat, the species was named in honor of Brazilian horticulturist Carlos Seidel, who contributed to the study and cultivation of Brazilian flora.

• Geographical Range: Endemic to southeastern Brazil
• Environment: Thrives in warm, humid, lowland tropical forests with rich, organic soils and consistent rainfall. It is typically found growing in shaded or semi-shaded understory habitats.

Leaves

• Large, sagittate (arrow-shaped) leaves with smooth margins and a lush green surface
• Venation is pronounced, and the leaf texture is typically soft and somewhat leathery

Inflorescence (Spadix & Spathe)

• Features a pale green to cream spathe enclosing a stout spadix
• Pollination studies are lacking, it likely follows the beetle-pollinated pattern seen in related specie

Growth Habit

• Terrestrial and tuberous, forming upright clumps
• Grows from a thick underground tuber and does not exhibit climbing or epiphytic behavior

Light Requirements

• Bright, indirect light
• Avoid prolonged exposure to strong direct sunlight

Watering & Humidity

• Keep soil consistently moist but not soggy
• Benefits from high humidity, particularly in indoor or greenhouse settings

Soil & Potting Mix

• Use a well-draining, organic-rich mix such as peat, compost, and perlite
• Ensure containers allow for drainage and airflow to the roots

Temperature & Fertilizer

• Ideal temperature range is 22–30°C (72–86°F)
• Fertilize monthly with a balanced or nitrogen-rich liquid fertilizer during the growing season

Division

• Best propagated by dividing tubers
• Section should contain at least one viable bud or shoot

Seeds

• Propagation is undocumented for this species
• Rare due to limited availability

Typical Issues

• Mealybugs, aphids, and spider mites
• Overwatering may lead to root or tuber rot

Treatment Recommendations

• Apply neem oil or insecticidal soap to manage pests
• Improve airflow and drainage to prevent fungal and bacterial issues

• Named after Carlos Seidel, who played a key role in Brazilian horticulture and helped promote native species
• Remains one of the lesser-known species of the genus

• Appreciated for its striking foliage and rarity
• Suitable for collectors or botanical gardens focused on Brazilian or tropical aroids

Wild Population Status

• Not formally assessed
• Habitat loss in Brazil’s Atlantic Forest may pose risks to its natural populations

Market Availability

• Extremely rare in cultivation
• Found primarily in botanical institutions or specialized collections