E. D.  Hatch, ?The New Zealand Forms of Corybas Salisb.?, Transactions of the Royal Society of New Zealand, vol. 76, no. 4, pp. 574 - 580, 1947.

E. D.  Hatch, ?Notes on New Zealand Orchids?, Transactions of the Royal Society of New Zealand, vol. 75, no. 3, pp. 367 - 370, 1945.