72 Ewart, Rees avd Wood: 



In Bentham's Flora Australiensis, Vol. VI., both are given as 

 distinct species but closely allied, the differences being — (1) 

 s.maller size, (2) radical leaves absent at floAvering, (3) galea 

 broader and more obtuse, (4) basal appendage of laVjelhim 

 obtuse and without the three terminal setae. The characters 

 1 and 2 are not reliable in orchids, being influenced by the 

 local, seasonal and other conditions. Specimens with broader 

 and obtuse galea have the three terminal setae, and others with 

 narrower and more pointed galea have the labellum, supposed 

 to characterise P. a2:)hylla. The latter is in fact hardly even 

 distinguishable as a well-defined variety of P. jjarvifloi'a. 



Ptero8Tyli8 nana, R. Br. var. pyramidali^. (P, pyramidalis). 

 (Orchidaceae). 



Lowden, Preston River, West Australia, Max Koch, Sept., 

 1910, No. 2083. 



Bentham distinguishes this as a separate species on the basis 

 of the bracts of the stem being more leaf-like and the basal 

 leaves less distinctly rosulate. These are not, however, con- 

 stant characters, and the flower is identical with that of P. 

 nana, in which the species was included by Mueller. 



Raphanus Raphanistrum, L. '• Wild Radish or Jointed Charlock."' 

 (Cruciferae). 



Central Greenough, North-West Australia, J. G. Young, per 

 Max Koch, Sept. 1910, No. 2099. 



This naturalised alien, a native of Europe, Asia and Africa, 

 is now widely distributed in the Central Greenough District of 

 North-West Australia. 



Secale cereale, L. " Common Rye." (Gramineae). 



Geelong, Victoria, H. B. Williamson, 1910, No. 1431. 

 Possibly an escape from cultivation. 



Setaria NIGRIR08TRIS, Duraud and Schinze. " Black-beaked 

 Set aria." (Gramineae). 



This plant is sometimes classed as »S'. imherhis, sometimes as 

 *S'. ainhigua, and also as a variety of ;S'. viridis, and it was in- 



