Papilionanthe sp. (Papilionanthe)

Papilionanthe is a genus of tropical orchids related to the vandas, known for their long, terete leaves and aerial roots that thrive in bright light and humid air. The plants often grow as monopodial climbers, sending out roots along the stem, and produce showy flowers with broad petals and a characteristic lip that may be brightly colored. They are valued for both ornamental display and for their role in orchid breeding, where they contribute vigor, heat tolerance, and striking floral forms.

Native to South and Southeast Asia, Papilionanthe species require warm, humid conditions with good air movement and regular watering. Their exposed roots depend on frequent misting or spraying in addition to soaking, especially during dry or hot weather. They are not frost tolerant and should be cultivated in USDA Zones 10-11, with protection needed if temperatures fall below 50 F. In cultivation they perform best in baskets or mounted on slabs, where roots can hang freely, and they respond well to frequent fertilization during active growth.

Papilionanthe hybrids combine the climbing habit and drought tolerance of the genus with traits from vandas and other orchid relatives. They are valued for vigorous growth, improved flower size and color range, and adaptability to warm tropical culture where regular misting and high humidity are maintained.