October, 1921.] 
THE ORCHID REVIEW. 
PTEROSTYLIS AUSTRALIS. 
By W. H. St. Quintin. 
3 Pterostylis is peculiar to the Australasian regio 
onfined to New Zealand, 28 to Australia—two 2 
ily one species is found outside these count 
Caledonia. I am indebted to Mr.'R. F. Burton for examples of two species,. 
P. australis, of which I send a photograph, and P. trullifolia, a much 
smaller plant, but like the rest of the genus, equipped -with the wonderful 
contrivance for ensuring the fertilisation of its flowers. I cannot do better 
than quote from Mr. T. F. Cheeseman’s “Manual of the New Zealand 
Flora,” which gives a very clear description of the process. “ The mode ol 
