Borassodendron machodonis
 
Common Names Borassodendron Palm, Machodonis Palm
 
Zones 10A–11
A towering fan palm native to the tropical rainforests of Malaysia and Thailand, Borassodendron machodonis is known for its solitary trunk and deeply split, glossy green leaves. Rare in cultivation and vulnerable in the wild, it thrives in humid, lowland environments with consistent moisture. Its sharp-edged petioles and dramatic foliage make it a striking but cautious addition to tropical landscapes.
 
Key Features
Growth Habit: Solitary; slow to moderate growth rate
Height: Up to 65 ft (20 m) in habitat
Trunk: Smooth, gray; slender and columnar; prominently ringed
Leaves: Palmately compound; very deeply split, glossy dark green; fan-shaped with stiff segments
Petiole: Long, extremely sharp-edged; capable of causing deep lacerations
Inflorescence: Male or mixed flowers on branched spikes; borne among leaves
Fruit: Oval to round; edible; used locally for food
Ecology: Native to lowland rainforests of Malaysia and Thailand; found on limestone hills and moist tropical slopes below 500 m elevation
 
Growing Conditions
Light: Full sun; tolerates filtered light when young
Watering: Regular; prefers consistently moist, well-drained soil
Soil: Rich loam or limestone-based substrate
Temperature: Ideal range 70–90°F (21–32°C); sensitive below 50°F
Humidity: High; thrives in rainforest conditions
Propagation: By seed; pre-soak for 24 hours; germination in 2–4 months
Tolerance: Sensitive to cold and drought; dislikes poor drainage
 
Landscape Use Ideal for tropical gardens, botanical collections, and shaded rainforest-style plantings. Pairs well with Johannesteijsmannia altifrons, Licuala grandis, and Calamus caryotoides.