Grammatophyllum martae Quisumb. ex Valmayor & D.Tiu
Color: Green with dark brown
Bloom Time: Summer
Grammatophyllum martae is a species of orchid with large pseudobulbs, up to 9 inches (22.5) cm tall and up to 4 inches (10 cm) in diameter. The leaves are at the apex of the pseudobulb, up to 2 feet (60 cm) long and up to 4 inches (10 cm) wide. Inflorescences reach up to 5 feet (1.5 m) in length and is able to carry up to 80 flowers. The flowers are up to 1.8 inches (4.5 cm) wide, dark brown with yellow markings.
USDA hardiness zone 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
How to Grow and Care
Grammatophyllums grow well in moderate light intensity. Morning sun is best, until about noon. Observation of the leaf structure can be your best guide to the correct light conditions for which a type is particularly suited. Lime green colored foliage is an indication of proper light. Dark green foliage, while very attractive, is not conducive to the plant reaching it's full blooming potential. Yellow colored foliage indicates too much light. In very mild climates, most members of this can be grown out of doors, with protection from the hot summer sun, and the colder nights of winter.
The ideal annual temperature range for most members of the genus Grammatophyllum are 75 to 85 °F (24 to 30 °C) during the day and 55 to 60 °F (13 to 16 °C) at night. Plants will tolerate temperatures to 45 °F (10 °C) and up to 100 °F (38 °C) for short periods. At higher temperatures, air circulation and humidity must be increased or damage can occur… – See more at: How to Grow and Care for Grammatophyllum
It is found only in Negros in the Philippines.
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