K.  Larsen, ?Thismiaceae?, in Flora of Thailand, Vol. 5, Part 1, T.  Smitinand and Larsen, K., Eds. Bangkok: Chutima Press, 1987, pp. 124 - 126.

K.  Larsen, ?Triuridaceae?, in Flora of Thailand, Vol. 2, Part 2, T.  Smitinand and Larsen, K., Eds. Bangkok: Asrct Press, 1972, pp. 175 - 176.