C. S.  Kumar, Kumar, P. C. S., Sibi, M., and Kumar, S. A., ?A new species of Gastrodia R. Br. (Orchidaceae) from Silent Valley, Kerala, India?, Rheedea, vol. 18(2), pp. 107 - 110, 2008.

L. V.  Averyanov and Efimov, P. G., ?New orchids from Vietnam?, Rheedea, vol. 16, pp. 15 - 28, 2006.

L. V.  Averyanov, ?New orchids from Vietnam?, Rheedea, vol. 15(2), pp. 85 - 101, 2005.

K.  Larsen and Averyanov, L. V., ?Thismia annamensis and Thismia tentaculata, two new species of Thismiaceae from central vietnam?, Rheedea, vol. 17, pp. 13 - 19, 2007.

N.  Sasidharan and Sujanapal, P., ?Rediscovery of Haplothismia exannulata Airy Shaw (Burmanniaceae) from its type locality?, Rheedea, vol. 10, pp. 131 - 134, 2000.