Adelonema wallisii (Regel) S.Y.Wong & Croat

• Genus: Adelonema
• Botanical Background: The species was originally described by the botanist Regel and later reclassified by S.Y. Wong and Croat. This genus has been the subject of various studies due to its striking morphological traits and distribution across tropical regions.

• Geographical Range: Adelonema wallisii is native to the tropical regions of Southeast Asia, specifically found in Malaysia and Borneo, where it thrives in moist, forested environments.
• Environment: This species grows in humid conditions, typically in shaded areas of tropical forests with rich, well-draining soils. It prefers temperatures ranging from 20°C to 30°C and high humidity levels.

Leaves

• Large, lanceolate leaves with a glossy texture and deep green coloration

• Prominent venation adds definition to the foliage

• Individual leaves can reach up to 30 cm long and 15 cm wide

Inflorescence (Spadix & Spathe)

• White spathe encloses a yellow to greenish spadix

• Subtly fragrant, which may attract beetles and other pollinators

• Aesthetic yet modest compared to showier aroids

Growth Habit

• Terrestrial growth habit with spreading rhizomes

• Prefers moist environments but does not climb

• Spreads laterally in ideal conditions without being invasive

  
  

Light Requirements

• Prefers bright, indirect light but can tolerate lower light conditions

• Avoid direct sun exposure to prevent leaf scorch

Watering & Humidity

• Requires consistently moist soil

• Avoid letting it dry out completely

• Thrives in high humidity (60% or more)

• Consider misting or a humidifier for indoor care

Soil & Potting Mix

• Use well-draining, loamy soil enriched with organic matter

• A mix of peat, perlite, and orchid bark supports both aeration and moisture retention

Temperature & Fertilizer

• Optimal temperature range: 68–86°F (20–30°C)

• Fertilize monthly during the growing season with a balanced, water-soluble fertilizer

Division

• Best propagated through rhizome division

• Each divided section should include at least one healthy shoot and root system

Stem Cuttings (if applicable)

• Less commonly used, but rhizome segments with nodes may be rooted under moist conditions

Seeds

• Seed propagation is possible with fresh seeds but not commonly practiced

• Requires warm, humid conditions and patience due to slow germination

Typical Issues

• Vulnerable to spider mites, aphids, and other common houseplant pests

• Fungal infections like root rot may occur in overly damp or poorly drained conditions

Treatment Recommendations

• Treat insect pests with neem oil or insecticidal soap

• Prevent root rot by maintaining proper drainage and avoiding waterlogged soil

• Ensure good air circulation and hygiene to reduce fungal risk

• Appreciated by aroid collectors for its distinctive, glossy foliage and ornamental appeal

• Not known for cultural or medicinal use, but valued in botanical and indoor plant collections

• Enhances tropical-themed gardens and adds lush texture to interior spaces

• Its broad leaves and elegant structure make it a standout in curated plant displays

Wild Population Status

• No major conservation concerns currently noted for Adelonema wallisii

• Like many tropical plants, it may be impacted by deforestation and habitat disturbance

Market Availability

• Not widely available in mainstream nurseries

• Occasionally found through specialty plant shops and collectors focused on rare tropical species