Bulbophyllum thiurum

Bulbophyllum thiurum, described in 2005 by J.J. Vermeulen & P. O'Byrne, is an orchid species native to Peninsular Malaysia, particularly Endau Rompin National Park. It is thought to be extinct in its natural habitat, surviving only in cultivation. The plant develops small pseudobulbs each with a single leaf, and produces pendant inflorescences bearing elongated yellow flowers up to 10 cm long. Flowering typically occurs from late winter into early spring. The species belongs to the Cirro-petalum group of Bulbophyllum, recognised for their elaborate sepal structures.

Distinctive Features

• Pseudobulbs: Small, ovoid pseudobulbs that are typically 2-3cm long (approximately 1 inch). Each pseudobulb produces a single leaf.
• Leaves: Leathery, dark green leaves that are typically 10-15cm long (approximately 4-6 inches). The leaves have a prominent midrib and a slightly wavy margin.
• Flowers: Produces clusters of fascinating flowers that resemble dancing ladies. The flowers are typically 2-3cm across (approximately 1 inch) and have a creamy white colour with purple markings. The lip of the flower is mobile, swaying in the slightest breeze, giving it the appearance of a dancing figure.
• Growth Habit: This Bulbophyllum has a sympodial growth habit, meaning it grows horizontally, producing new pseudobulbs along a rhizome. It is an epiphyte, which means it naturally grows on trees and other surfaces, absorbing moisture and nutrients from the air and rain.

Care Tips

• Light: Bright, indirect light is best. Avoid harsh direct sunlight, which can scorch the leaves. An east-facing windowsill is often ideal.
• Water: Water regularly, allowing the potting mix to dry slightly between waterings. Avoid overwatering, which can lead to root rot.
• Humidity: This Bulbophyllum appreciates high humidity. You can increase humidity by using a humidifier, placing the plant on a pebble tray filled with water, or misting the leaves regularly.
• Temperature: Maintain warm temperatures between 20-29°C (68-85°F) for optimal growth. Avoid exposing this tropical orchid to cold draughts or temperatures below 15°C (59°F).
• Fertiliser: Use a diluted orchid fertiliser once a month during the growing season (spring and summer). This will help to encourage healthy growth and flowering.
• Potting: This orchid can be grown in pots or mounted on cork bark or tree fern. Use a well-draining orchid potting mix that allows for good air circulation around the roots.