Cyrtosperma johnstonii (W.Bull ex T.Moore & Mast.) N.E.Br.

• Genus: Cyrtosperma
• Botanical Background:  Described by botanists including W. Bull, T. Moore, Mast., and later revised by N.E. Brown. Its scientific history reflects contributions from several early botanists who specialized in tropical flora.

• Geographical Range:  Native to tropical regions, this species is found in areas with warm climates. It has been recorded in regions of Southeast Asia and the Pacific.
• Environment:  Thrives i n humid, lowland tropical environments with rich, well-drained soils. Consistent moisture and a warm climate are key to its survival.

Leaves

• Large and broad with a glossy texture and deep green coloration
• Exhibit prominent veins and an attractive, paddle-like shape

Inflorescence (Spadix & Spathe)

• Spathe that is generally green or off-white and a spadix that bears numerous small flowers
• Insect pollination is common for this structure

Growth Habit

• Terrestrial plant that grows from a robust rhizome

• Forms clumps and can reach a notable size under optimal conditions

Light Requirements

• Bright, indirect light which helps to maintain its vibrant foliage without causing leaf burn

Watering & Humidity

• Regular watering and high humidity

• Allow the soil to remain moist but not waterlogged

Soil & Potting Mix

• A rich, loamy soil that drains well

• Container with good drainage is ideal for pot cultivation

Temperature & Fertilizer

• Prefers temperatures above 60°F

• Balanced fertilizer applied during the growing season can support healthy growth

Division and Cuttings

• Division of rhizomes, promotes vigorous growth and is the most common technique

Seeds

• Can be sown, but less frequently used due to variable germination rates compared to vegetative propagation

Typical Issues

• Spider mites and mealybugs
• Potential root rot from excessive moisture

Treatment Recommendations

• Organic insecticides
• Ensuring proper drainage and regular inspection can help prevent major outbreaks

• Holds cultural significance in some tropical regions and may feature in local folklore

• Plays a role in its native ecosystem

• Prize for its dramatic leaf shape and the lush tropical aesthetic it brings to gardens and indoor collections

Wild Population Status

• Not classified as critically endangered, but habitat is under pressure from land use changes; Conservation efforts in some regions aim to preserve its natural environment

Market Availability

• Relatively rare in mainstream nurseries but can be sourced from specialist tropical or aroid plant collections