Mediocalcar decoratum

Mediocalcar decoratum is a miniature orchid from New Guinea that gradually forms dense clusters of pseudobulbs and leaves arranged like a small propeller. It is prized for its solitary, bell-shaped flowers, which appear on new growth and can persist for a long time.

Origin and identity. The species grows epiphytically in Papua New Guinea and Irian Jaya, usually at elevations between 900 and 2,000 m, and sometimes higher. It was described by Andre Schuiteman in 1989. Its high-altitude habitat explains its preference for cool to intermediate temperatures, clean water, and consistent humidity.

Light and temperature. Place it in medium, filtered light; direct sunlight can scorch the small leaves. In particular, avoid prolonged overheating behind glass during summer. The plant does best with good ventilation and moderate temperatures, rather than in an enclosed, hot corner.

Watering and fertilizing. The roots should not be allowed to dry out completely. Water when the moss or growing medium is close to drying out, then let the excess water drain away; stagnant water around the roots quickly causes problems. During the active growing season, apply diluted orchid fertilizer.

Mounting and repotting. It can be kept in a small pot, an airy basket, or mounted, using airy sphagnum moss or fine bark. Do not divide the clump simply because the plant has become dense: a mature specimen with many pseudobulbs produces a more spectacular display of flowers. Repot only when new growth appears and the growing medium has broken down.

Practical signs. Soft or wrinkled leaves may indicate dried-out roots or growing medium that no longer retains water. Soft, dark-colored bases indicate excess moisture and insufficient ventilation. A lack of flowers is often related to insufficient light or a plant that is still too small.