Chysis

Chysis is a genus of orchids belonging to the family Orchidaceae, encompassing approximately ten accepted species. These orchids are native to a broad geographical area extending from Mexico southward to Peru. While several species exist, only a select few are commonly encountered in cultivation.

Description and Characteristics

The defining features of the Chysis genus include elongated, spindle-shaped pseudobulbs that are typically pendulous and can vary in thickness depending on the species. The leaves are notably soft and papery, with prominent ribs, and possess a capacity to tolerate more light than their texture might suggest. Chysis orchids are generally partially deciduous, though their leaves often persist for two years.

The inflorescences are multi-flowered and emerge from the base of the pseudobulb concurrent with new growth. Flower coloration in this genus commonly ranges from white, as observed in Chysis bractescens, to various shades of orange-yellow, exemplified by Chysis aurea and Chysis laevis. The pollinia, the pollen masses, are frequently fused, a characteristic that inspired the genus name 'Chysis,' derived from the Greek word for 'melting.'

Cultivation and Growth Habits

Chysis orchids are epiphytic, meaning they naturally grow on other plants, typically trees, and are found in shady, damp environments at elevations up to 1000 meters. They are best cultivated under intermediate temperature conditions. Due to their natural pendulous habit, they are often grown mounted on supports, although certain species adapt well to pot culture. During periods of active growth, these orchids require generous watering and feeding. Watering should be reduced once the season's growth has concluded, but complete drying out of the potting medium is to be avoided even during the rest period, and the pseudobulbs should never be allowed to shrivel.