Gastrorchis

Description

Gastrorchis is a genus of orchids that belongs to the family Orchidaceae. It comprises about 10-12 species of epiphytic and lithophytic plants that are native to tropical Africa, Madagascar, and the Comoros Islands. The name “Gastrorchis” is derived from the Greek words “gastra” meaning belly and “orchis” meaning testicle, referring to the shape of the flowers. The plants have a sympodial growth habit, producing pseudobulbs that are usually slender and elongated, with a single leaf or two leaves at the apex. The flowers are showy and come in various colors including white, pink, green, and purple. The lip is often inflated and has a pouch-like shape. The flowers are pollinated by insects such as bees and flies.

Taxonomic Information

Appearance

Gastrorchis plants have a unique appearance with elongated pseudobulbs and a single leaf or two leaves at the apex. The plants can grow up to 30-40 cm in height. The flowers are the most attractive feature of the plants with a pouch-like lip that is often inflated. The flowers can be white, pink, green, or purple and are borne on long inflorescences that can grow up to 60 cm long. The flowers can last for several weeks, and new flowers can bloom from the same inflorescence over time.

Care Guide

Gastrorchis plants require specific care to thrive. Here are some tips for taking care of your Gastrorchis:Water: Gastrorchis plants require regular watering during the growing season, but they should be allowed to dry out between waterings. Overwatering can cause root rot, so it’s essential to ensure that the potting mix is well-draining.Fertilization: Gastrorchis plants require regular fertilization during the growing season. A balanced fertilizer with an equal ratio of nitrogen, phosphorus, and potassium can be used every two weeks.Soil: Gastrorchis plants prefer a well-draining potting mix that is rich in organic matter. A mix of sphagnum moss, perlite, and bark chips can be used.Sunlight: Gastrorchis plants prefer bright, indirect sunlight. Direct sunlight can scorch the leaves and flowers.Hardiness Zones: Gastrorchis plants are not frost-tolerant and require a minimum temperature of 15°C. They can be grown in hardiness zones 10-11.

Common Pests & Diseases

Gastrorchis plants can be susceptible to pests and diseases. Here are some common problems and their remedies:Spider mites: Tiny spider-like pests that can cause yellowing and wilting of the leaves. Use a miticide to control the infestation.Scale insects: Small, round insects that attach themselves to the leaves and stems. Use a horticultural oil or insecticidal soap to control the infestation.Root rot: Caused by overwatering or poor drainage. Remove affected roots and repot the plant in fresh, well-draining soil.

Habitat

Gastrorchis plants are native to tropical Africa, Madagascar, and the Comoros Islands. They are epiphytic or lithophytic and can be found growing on trees or rocks in humid rainforests or montane forests. They can also grow in open savannas or on rocky slopes.

Question and Answer

Q: How often should I fertilize my Gastrorchis plant?
A: Gastrorchis plants require fertilization every two weeks during the growing season.Q: Can Gastrorchis plants tolerate direct sunlight?
A: No, Gastrorchis plants prefer bright, indirect sunlight.Q: What is the minimum temperature required for Gastrorchis plants?
A: Gastrorchis plants require a minimum temperature of 15°C.Q: How can I control spider mites on my Gastrorchis plant?
A: Use a miticide to control spider mites on your Gastrorchis plant.

Related Plants

Here are some related plants to Gastrorchis:- Angraecum- Bulbophyllum- Cymbidium- Dendrobium- Phalaenopsis- Vanda

References

– Orchids of Madagascar: Gastrorchis. (n.d.). Retrieved April 9, 2021, from https://www.orchids.mg/genera/gastrorchis/- Gastrorchis. (n.d.). Retrieved April 9, 2021, from https://www.rhs.org.uk/plants/27482/gastrorchis/details