The generic name, of Greek origin, is formed from Kolos - hollow, empty, and gyne - woman, alluding to the stigma of the flowers, which has a concavity. The specific name, Glandulosa, refers to the fact that the plant has glands. The species was described by Lindley in 1853.
Coelogyne glandulosa is a species of epiphytic or lithophytic orchid that populates mountain forests in southern India, at altitudes between 1000 and 2000 meters above sea level. The small-sized plant grows at low temperatures, presenting oval, striated bulbs.
Blooms in spring, the inflorescence measuring up to 20 cm and having 2-8 flowers along the length of the flower spike. The inflorescence emerges from newly formed pseudobulbs, and the flowers are white with a yellow mark on the labellum, which is triple and measures 2 cm long and 2 cm wide. The pseudobulbs are ovoid, curved with age, keeled, basally covered by several leathery sheaths, bearing 2 elliptic-oblong to oblong-lanceolate leaves, acute, folded, with 7 - 11 nerves, wavy, leathery, narrowing towards the base in the form of a petiole.
In spring, erect flower spikes about 20 cm long emerge from the pseudobulbs, bearing flowers with simultaneous blooming and persistent bracts. The flowers number 2 - 8 per inflorescence, appearing on the new pseudobulbs.
Coelogyne glandulosa loves strong light but it is not recommended to keep it in direct sunlight.
The optimal temperature during summer is between 18-20 °C during the day and 10-14 °C at night. In winter, the optimal temperature should be 15 °C during the day and 10 °C at night.
The optimal humidity level is 60% or more. Too dry air negatively affects the growth and development of the plant. This species is grown in pots or suspended wooden boxes. The substrate must be airy, therefore coarse bark will be used, which can be replaced with coarse coconut fiber.
Coelogyne glandulosa reacts negatively to transplanting, so it is only replanted when absolutely necessary. The best time for replanting is immediately after flowering, but not in the spring period because the plant will not flower afterward.
Watering is done frequently and abundantly during the growth period. Excess water must be well drained from the pot because its stagnation leads to root and lower part rot of the plant. Between waterings, the substrate should be allowed to dry completely.
During the new growth period, the plant must be fertilized every 3 waterings, with a regular fertilizer, at the concentration indicated by the manufacturer. To stimulate flowering, Coelogyne glandulosa needs a well-defined rest period. In winter, the substrate of the plants must be drier and fertilization stops. The temperature should be 15 °C during the day, and 10 °C at night. Watering is completely stopped or replaced with a simple misting of the substrate once every 4-5 weeks. After new buds appear, the rest period ends and regular watering resumes, and the overall temperature will be increased.
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