Anthurium macrolonchium Sodiro

• Genus: Anthurium
• Botanical Background: Named by the botanist Sodiro, first described in the early 20th century. It has been a subject of interest for collectors due to its large, leathery leaves and appealing inflorescences.

• Geographical Range: Primarily found in the tropical rainforests of Ecuador and Colombia, where it grows at low to medium altitudes.
• Environment: Thrives in humid, warm conditions with frequent rainfall; prefers well-draining, rich, organic soils that mimic its natural environment; requires high humidity and consistent moisture, making it ideal for greenhouse cultivation in temperate climates.

Leaves

• Long, lanceolate leaves that can reach significant sizes
• Glossy, thick, and leathery texture
• Dark green with pronounced veins, giving it a textured appearance
• No variegation but striking leaf form
  

Inflorescence (Spadix & Spathe)

• The spadix can grow up to 10 cm in length, surrounded by a large, white spathe
• The spathe is white, often turning a light green with age
• No significant scent
• Likely pollinated by insects such as beetles

Growth Habit

• Terrestrial, though it can occasionally grow epiphytically in its natural habitat
• Has a rhizomatous growth habit, forming small, tuber-like roots beneath the soil

Light Requirements

• Bright; indirect light
• Avoid direct sunlight to prevent leaf scorch

Watering & Humidity

• Keep the soil consistently moist with excellent drainage to avoid waterlogging
• High humidity is essential for optimal growth; 60% or more

Soil & Potting Mix

• A well-draining, loamy mix with added organic matter is best
• A mix of peat, perlite, and pine bark is recommended for optimal growth

Temperature & Fertilizer

• Ideal temperatures between 20°C and 30°C
• Balanced liquid fertilizer diluted to half strength

Division and Cuttings

• Division of the rhizomes during repotting
• Stem cuttings are also viable, although this can be a slower method

Seeds

• Require warm, humid conditions to germinate. However, this method is less commonly used

Typical Issues

• Spider mites, mealybugs, and scale insects
• Overwatering can lead to root rot or fungal infections
• Proper drainage and careful watering are essential

Treatment Recommendations

• Organic treatments like neem oil or insecticidal soap are effective for controlling pest infestations
• Adjust watering practices and improve air circulation to prevent fungal issue
• Use chemical treatments sparingly when necessary

• Rare ornamental species highly sought after by collectors for its striking foliage and large inflorescences
• Known to grow well in tropical conservatories and large, humid indoor spaces

• Prized for its glossy, large leaves and attractive spadix
• Makes a bold statement in decorative plant collections

Wild Population Status

• Not currently listed as threatened
• Habitat loss in its native regions could pose a risk

Market Availability

• Somewhat rare in the horticultural market
• Occasionally be found in specialty plant nurseries and among collectors