Orchids For The Cool Greenhouse

Orchids for a cool greenhouse 

Promenea

There are about 15 species of these dwarf epiphytes found in Brazil. They have small, clustered pseudobulbs, grey-green leaves and relatively large, fleshy flowers. Pot in a free draining compost.

Rossioglossum

This genus contains six species from Mexico and Central America, closely related to Odontoglossum. The flowers are large and showy, usually yellow with brown markings. Grow in a standard compost in a shallow pot or basket. Give plenty of water and fertilizer while in growth but keep drier and cooler in winter.

R. grande

(synonym Odontoglossum grande) is called the clown orchid. The flower spikes are about 30cm (12in) long, each with about eight flowers. The flowers are 15cm (6in) in diameter with yellow sepals, barred and dotted with chestnut brown. The petals are yellow with a brown base and the lip is cream or pale yellow, banded with red and brown. The yellow and red callus is supposed to resemble a clown. Flowers appear in autumn and winter.

 

P. guttata

is less than 8cm (3in) tall; the flowers are bright yellow barred with red, the lip is dark purple at the base, and the tip yellow.

P. stapelioides

has cream to beige flowers, heavily banded with maroon, with a purple lip, in summer.

P. xanthina

(also known as P. citrina) has primrose yellow flowers with a bright yellow lip, in summer.

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