J. J. Wood & J. B. Comber 1993
This species occurs in northern Sumatra in areas with high year-round rainfall.
The type specimen was collected northeast of
Lake Toba at about 1500m. It has also been found on Mt. Dolok at 1000-1300m.
Plant size 25-30cm. The flowers are 7-8cm across. Intermediate conditions. Growing conditions should be maintained all year!