206 



Pollinia 2, attached by caudicle to rostellum by a single 

 ovate disc. 



Rostellum with cup-shaped depi'ession in apex for disc, 

 rather shorter than anther. 



Stigma oval or ovate just below rostellum. 



Ovary plano-convex, reflexed on dorsal sepal. 



Fertilization does not occur when the flowers are deve- 

 loped under bell -jars or out of reach of insects. In the 

 newly-opened flower the two pollinia lie immediately behind 

 the erect rostellum, the caudicle, which is a little more than 

 half their length, being attached adnately along the rostel- 

 lar side of their groove of union and fastened by a single 

 ovate disc to the top of the rostellum. As the flowers get 

 older the rostellum curves forward, the disc which has hither- 

 to been protected by the soft anther-point becomes exposed 

 and contracted, and the pollen-masses are drawn slightly 

 out of the anther-case. This latter movement jDroduces an 

 angular space between the back of the rostellum and the 

 pollinia, with the result that the caudicle, which has hitherto 

 been kept moist between these two surfaces, now becomes 

 exposed to the air. The caudicle dries, and as it does so 

 an upward movement takes place in it and the pollinia, the 

 latter being gradually raised vertically above the rostellum. 

 This movement continues until they are carried forward and 

 projected horizontally towards the labellum. The disc can 

 now be readily detached from the rostellum, and the flower 

 is ready for fertilization by visiting insects. 



The usual time of blooming in this State is the begin- 

 ning of April, although it may be hastened by early rains. 

 I have found it in the middle of March, and one season it 

 appeared in February. 



Robert Brown must have collected his first specimens at 

 Port Lincoln between February 26 and March 6, an unusu- 

 ally early time for blooming, accounted for b}' the fact that 

 the Port Lincoln season is somewhat in advance of our own 

 (Adelaide). 



Distribution : Mount Lofty Ranges, Meadows and dis- 

 trict, Myponga, Yankalilla, Victor Harbour district, Goolwa, 

 Kangaroo Island. 



2. P. Tepperi, Mueller-Rogers, ^p. nor. PI. vii.B, tigs. 1 to 8. 



This apjDears as a iiomen nitdinn in F. v. Mueller's first 

 "Census of Australian Plants" (p. 140), but is omitted 

 from the second census. A reference is made to it in Trans- 

 actions of this Society, 1880 (p. 32), in 'Tlants about 

 Ardrossan," by Mr. Tepper (its discoverer). No botanical 

 description has hitherto appeared. 



