262 A LIST OF THE INDIGENOUS PLANTS OF THE MUDGEE DISTRICT, 



Woolls, to whose untiring kindness I owe a great deal of help in 

 this and other botanical matters. I am indebted to Mr. Percy 

 Williams for a note on the occurrence of Styphelia viridis at 

 Cooyal. 



In collectins: towards the west and north-west — towards Cob- 

 bora for instance — a slight change is noticeable in the character of 

 the vegetation, showing an approximation to the flora of the 

 plains ; but it is not at all marked till Cobbora is passed, which is 

 far beyond the limits of the Mudgee district. Eastward from 

 Mudgee the change to the sandstone vegetation is very sudden, 

 the ordinary forms occurring right up to the foot of the Dividing 

 Range. 



The remarks I made on the gradual extinction of some species 

 of orchids apply with equal force to the plants in this list, culti- 

 vation, clearing, and the influx of introduced plants being the 

 principal factors concerned in their disappearance. The last is 

 very noticeable in land ringbarked or cleared, the sudden appear- 

 ance and growth of aliens being then very marked. Drought is 

 not so potent an agent as might be thought. About six years ago 

 I collected Euphrasia scabra in a cleared paddock near my own 

 residence. As it was so near, I neglected to preserve specimens, 

 and during the five dry years which followed, not one plant was 

 to be found. The moist summer of 1886 however, brought it up 

 again in the same limited locality, so that the seeds must have 

 existed with unimpaired vitality through five years' droughts, 

 during which the paddock was more than once burnt. This 

 remark also applies to Centrolepis fascicularis, which sprang up 

 after the same long interval in that locality. 



It will be seen that I have included the orchids in this list 

 although I have already given a paper on the subject. But I 

 thought it would be better not to break the regular sequence of 

 the orders by leaving them out. 



I hope soon to give a list of the introduced plants of the district. 



The nomenclature and arrangement adopted is that of the 

 Systematic Census of Australian Plants by Baron F. v. Mueller. 



