BY ALEX. G. HAMILTON. 871 



30. Pterostylis nutans, R. Br. 



Confined to one spot in Biraganbil hills, and to a gully at 

 Cooyal. Flowers in June and July. 



31. Pterostylis clavigera, R.D.F. 



R. D. Fitzgerald, Jour, of Bot. Vol. XXIII., p. 135. 



Named from specimens procured from Biraganbil Hills, Near 

 P. 7iana, but it has glands on the anther wings. Flowers in 

 September. 



32. Pterostylis reflexa, R. Br. 



There are two well-marked varieties of this plant growing in 

 the neighbourhood of Guntawang, which I took to be distinct 

 species. Both are figured in Australian Orchids, Yol. I., pt. 5, 

 pi. 7. The larger variety may possibly be the plant named 

 P. revoluta by R. Brown, but Bentham says that the two forms 

 pass into each other to such an extent that it was impossible to 

 sort specimens into distinct varieties even. As I had never collected 

 any plant linking the two I thought them good species till Mr. 

 Fitzgerald on receiving both from me gave me the above informa- 

 tion. Flowers from March till July. 



33 Pterostylis obtusa, R. Br. 



Found only at Cooyal in rich soil at the foot of a sandstone cliff. 

 Flowers in April. 



34. Pterostylis parviflora, R. Br. 



The plants I sent Mr. Fitzgerald he informed me were P. aphylla, 

 but added that he considered this only a variety of P. parviflora, 

 so I have placed it under that name. It is generally distributed 

 ttut is not very abundant. Flowers in April, May, and June. 



35. Pterostylis mutica, R. Br. 

 Common in all parts. Flowers from August to October. 



