The Oncostele Geyser Gold is a sympodial epiphyte orchid hybrid. It was registered in 1989 by Geyserland and it is a cross between Oncostele Anneliese Rothenberger and Oncidium Parade. The striking gold color of the flower is not a common occurrence in the orchid world and the combination of dark yellow and white patterns make this orchid very appealing among orchid enthusiasts. The name Odontoglossum is still used in the trade, but the recent reclassification place this orchid in the Oncostele hybrids family.
The shape of the blooms is very typical for this family of orchids and can be described as a very compact star, with petals and sepals having approximatively the same length. The flower is about 6-7 cm in diameter, with similar colors on the petals and lip.
The background color is pale yellow, almost white with splashes of yellow orange colors, resembling an animal print. The base color of the lip is an even darker yellow orange with a pale yellow pattern, more linear than on the petals. Despite their beauty, the flowers of this orchid are not fragrant.
This orchid can bloom multiple times in one year. Usually, with every maturing pseudobulb a flower spike can be produced. In some cases the orchid can produce 2 flower spikes emerging from each side of the pseudobulb.
The flowers usually last between 4 to 8 weeks, depending on environment. After the blooms fall, usually the orchid starts to produce new pseudobulbs. The spikes can be cut near the base after the blooms drop, as they will not rebloom, or produce plantlets.
The pseudobulbs are about 8 cm in height and about 3 cm in width, with an oval shape. The normal color for this orchid is light green. The leaves are long and slender, measuring about 25-30 cm in length and about 2-3 cm in width. The leaves are prone to obtain accordion shape growth if the orchid is kept too dry and in too low humidity.
The roots are about 2-3 mm thin and healthy roots are white, but as they age, they can turn green when wet. When in active growth they have bright green tips. New growths usually appear from between the last exterior leaves and take between 6 to 9 months to fully mature.
Propagation of this orchid can be done through division, each division should have at least 3 fully grown pseudobulbs for a fast growth further on.
Soft spots: pleated leaves if kept too dry, pleated flower spikes if the leaves don’t develop normally
Overall the Oncostele Geyser Gold is a medium difficulty orchid to grow. It seems to not be as vigorous or quick to recover like other Oncostele hybrids. Pleated leaves can be a very common occurrence in a normal home environment with dry air, or inadequate moisture inside the growing media.
Video presentation of Oncostele Geyser Gold