Family: Orchidaceae

Originating from Central and South America, this very large genus of over 450 orchids is quite variable. Some have pseudobulbs; some do not. Those usually grown are epiphytes. A number of the most commonly grown species are referred to as 'dancing ladies' and provide long-lasting cut flowers. Grow in an intermediate greenhouse or conservatory with a minimum temperature of 13°C (55°F).

Species

O. cheirophorum, a true miniature with a profusion of bright yellow flowers, needs only a 10 cm (4 in) pot.

O. flexuosum is a fast grower. Grow it in an orchid basket or on a slab of bark. Its many sprays of yellow flowers are marked with red-brown.

O. lanceanum has long sprays of yellowish brown flowers, marked with reddish brown. The lip is in shades of purple and the leaves are patterned in reddish brown.

0. sphacelatum produces long sprays of many hundreds of small, yellow flowers, marked with red-brown. Species orchids are rarely available as there are many more appeal­ing cultivars.

Cultivation

These orchids can be grown in pots or hanging orchid baskets containing hark-based orchid compost, or mounted on slabs of bark and hung up in the greenhouse. In the growing season, provide a humid atmosphere and good light, but shade from direct sun, and water frequently. In winter, ensure maximum light and keep plants dry, except for those without or with only tiny pseudobulbs, which should be kept moist. Propagate plants by divi­sion when they outgrow their pots.

Climate

Tropical or subtropical.