Leaves few, elliptic to oblanceolate, acute or acuminate, cuneate at the base; Inflorescence ascending to 17 cm long when in flower, lengthening in fruit, with 30-40 flowers.
Asia-Tropical: Malaya (Peninsular Malaysia present); Thailand (Thailand), Bujong Malacca present, Penang Highlands present, Perak present
Malesia: Malay Peninsula (Perak: Bujong Malacca; Penang Highlands); probably also in Thailand.
This species closely resembles T. squalida, the type species of the genus, from the Himalayas. Further study is needed to confirm that they should be kept separate. In the absence of recent collections much of the information here is taken from Ridley (1924). The scale-like leaves recorded for T. gracilis are likely to occur in T. violacea, but the basal part of the plant has not been preserved.