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2. c SECTION ANNAMAEA
This is a single species section, related to the sections Eburnea and Iridorchis.
2. c. I Cym erythrostylum Rolfe
First described by Rolfe in 1906 from a plant collected by Micholitz in 1891. It is one of the most attractive of the large flowered species, with its glistening fragile looking white petals and sepals, and its boldly red marked lip and red column. Its early flowering period and its long lasting flowers have made it a useful species for hybridisation.
This is a plant gowning naturally as an epiphyte, lithophyte or terrestrial, producing pseudobulbs 60 x 20 mm, each producing 6 to 8 leaves, which are 450 mm long. The flower scape is 150 to 350 mm long, erect to arching, slender, bearing usually 4 to 8 flowers, although sometimes more or less. Each flower is about 60 mm across, appearing narrowly triangular, not scanted. The sepals and petals are white, the petals pale pink along the mid vein, the basal half, sometimes spotted with pink at the base, glistening as though covered in frost and rather thin in texture. The lip is yellow-white, darker yellow showing on the mid lobe, strongly veined with deep red, the veins becoming broken and spotted towards the margins of the side lobes. The callus is cream, strongly pink mottled.
Native of Vietnam, growing about 1500 metres above sea level, its specific habitat is not known. It is reported to flower in late spring to summer in nature, mid autumn to early winter under cultivation.