Stenospermation wallisii Mast.

• Genus: Stenospermation
• Botanical Background: Stenospermation wallisii was first described by botanist Maxwell T. Mast in the early 20th century, with the species being named in honor of a prominent botanical figure, Wallis. The species was first discovered in the rainforests of Panama.

• Geographical Range: Primarily found in Central America, specifically in the tropical regions of Panama and Costa Rica. It prefers lowland and mid-elevation rainforests
• Environment: Thrives in humid, shaded environments with consistently moist conditions; commonly found in well-draining soils; climate is typically warm with consistent rainfall throughout the year

Leaves

• Large, broad, and glossy
• Typically reaching 30-45 cm in length
• Heart-shaped
• Rich green color and subtle venation patterns

Inflorescence (Spadix & Spathe)

• Unique spadix surrounded by a white or cream-colored spathe
• Has a sweet scent that attracts pollinators such as insects
• Pollination is often facilitated by small flies attracted to the spadix’s odor

Growth Habit

• Terrestrial plant that grows in dense clusters
• Does not climb and is not epiphytic but rather thrives in rich, humus-filled soil

Light Requirements

• Bright, indirect light
• Can tolerate lower light levels

Watering & Humidity

• Frequent but well-drained
• High humidity levels of 60% or more are ideal for maintaining healthy growth

Soil & Potting Mix

• A well-draining, loamy mix rich in organic matter is ideal
• Ghould be potted in a container with good drainage to prevent root rot

Temperature & Fertilizer

• Thrives in temperatures between 18-27°C (65-80°F)
• Balanced liquid fertilizer applied every 4-6 weeks

Division

• Most common method of propagation is by dividing the rhizome during the growing season

Stem Cuttings (if applicable)

• Stem cuttings can also be rooted in high humidity, though this method is less reliable

Seeds

• Less common, as seeds can take several months to germinate under optimal conditions

Typical Issues

• Spider mites and aphids, which can damage the leaves
• Root rot is a concern if the plant is overwatered or the soil does not drain properly

Treatment Recommendations

• Insecticidal soap or neem oil can be used to treat pest infestations
• Improve drainage and reduce watering frequency.
• Ensure good air circulation around the plant

• Known for its appealing foliage and rare inflorescence, making it a coveted species for collectors and horticulturists
• Contributes to the biodiversity of tropical rainforests

• Valuable ornamental plant for both collectors and interior decorators seeking tropical appeal

Wild Population Status

• No major conservation concerns for S. wallisii at present, although deforestation in its native regions may pose a long-term threat to its natural habitat

Market Availability

• Moderately available in the market
• Considered rare outside its native range
• Sometimes found in specialized plant nurseries or through aroid enthusiast networks