Diuris

Description

Diuris is a genus of terrestrial orchids native to Australia. They are commonly known as ‘donkey orchids’ due to the shape of their column resembling a donkey’s head. The name Diuris comes from the Greek word ‘di’ meaning two and ‘oura’ meaning tail, referring to the two spurs or tails on the labellum or lip of the flower. One of the most striking features of Diuris is their unique dancing petals. These orchids have two large petals and three smaller ones. The two larger petals resemble a pair of legs and move up and down as if the orchid is dancing. This unique trait has earned Diuris the nickname ‘dancing orchids’.

Taxonomic Information

Appearance

Diuris flowers range in color from yellow, orange, red, to brown. The flowers usually have a distinct pattern of spots or blotches on the petals. The flowers grow on stems that range from 20 to 60 centimeters in height. The leaves are typically narrow and grass-like, growing up to 30 centimeters long.

Care Guide

Diuris orchids prefer well-draining soil that is rich in organic matter. They prefer moderate watering and should be allowed to dry out slightly between waterings. Fertilize them with a balanced fertilizer every two weeks during the growing season. Diuris orchids prefer bright, indirect light and can be grown in full sun in cooler climates. They are hardy in USDA zones 8 to 11.

Common Pests & Diseases

Common pests that affect Diuris orchids include spider mites, thrips, and mealybugs. These pests can be controlled with insecticidal soap or neem oil. Diuris orchids are susceptible to root rot, which can be prevented by ensuring proper drainage and avoiding overwatering.

Habitat

Diuris orchids are found in a variety of habitats, including grasslands, woodlands, and forests. They are widespread across Australia and can be found in most states. Some species of Diuris are endangered due to habitat destruction and collection for the horticultural trade.

Question and Answer

Q: How often should I fertilize my Diuris orchids?

A: Fertilize your Diuris orchids every two weeks during the growing season.

Q: Can Diuris orchids be grown in full sun?

A: Yes, Diuris orchids can be grown in full sun in cooler climates.

Q: What is the hardiness zone for Diuris orchids?

A: Diuris orchids are hardy in USDA zones 8 to 11.

Q: Are Diuris orchids endangered?

A: Yes, some species of Diuris are endangered due to habitat destruction and collection for the horticultural trade.

Related Plants

• Caladenia
• Cyanicula
• Pterostylis
• Thelymitra

References

• “Diuris – Donkey Orchids”. Australian Native Orchid Society.
• “Diuris”. Wikipedia.
• “Diuris”. Royal Botanic Gardens Victoria.