216 



Lateral sepals about 3;^ lines, quite free, parallel, lance- 

 olate, with cylindrical slightly bidentate points, concave en 

 the upper surface. 



Dorsal sepal nearly 3 lines, not reci;rved. 



Petals about 2 lines, bluntly linear, not sjareading. 



Lateral index very low, about 64. 



Labellum ovate-lanceolate, sessile : erect part rather 

 bulging with entire margins ; distal part with slightly crenu- 

 lated margins; callous portion occupying a relatively large 

 part of the surface, extending much beyond the bend and 

 reaching nearly to the tip. 



Lateral appendages about same height as rostellum, 

 wide, almost Cjuadrangular, with blunt free end, and rela- 

 tively large basal lobe reaching considerably beyond the 

 middle. 



Anther-case pointless, nearly as high as rostellum. 



Stigmatic surface reniform, occupying full breadth of 

 middle lobe of column, just below rostellum. 



■COMPABATIVE MEASUREMENTS OF F. fuSCUVl, P. JJOfeHS, P. 



odoratum, and P. album. 



Part. 



Lateral sepals 

 Dorsal sepal 

 Petals 



P. Jmcum. 



3^ lines 

 3 lines 

 2 lines 



P. patenfs. P. odoratum, P. albwhi. 



4 lines 

 3f lines 

 21 lines 



5 lines I 4 lines 

 5 lines 4 lines 



4^ lines : 3^ lines 



In P. fuscum and P. odoratum lateral sepals longer than 

 dorsal sepal. 



In P. odoratum and P. album the sepals are equal. 



In P. fu!<cum and P. patens lateral sepals exceed petals 

 b)y I4 lines. 



In P. odoratum and P. album lateral sepals exceed 

 petals by \ line. 



P. fuscum, blooms in September and October. 



It is widely distributed on plains and hills and also on 

 Kangaroo Island. 



14. Prasophyllum Fitzgeraldi, Rogers-Maiden, up. nov. 

 PL xi.A, tigs. 1 to 8. 



A fairly stout species from about 7 to 18 in. in height. 

 Leaf of varying length, sometimes extending beyond the 

 top of the spike. 



