Distribution
Asia-Tropical: Thailand (Thailand present), Ceylon present, N.E. India present, Southern India present, northern Malaya present
Southern India&Ceylon; N.E. India, Thailand; Malesia: to northern Malaya.
Notes
The Indian specimens lack orange glandular hairs on the lower surface, but such glands are present on all specimens from Thailand and Malaya. Manton found a Ceylon plant to be tetraploid, Loyal found plants in N. India to be diploid.
Citation
Molesworth Allen 1967 – In: Gard. Bull. Sing.: 180, 185
Holttum 1976 – In: Kew Bull.: 321
