PRESIDENTIAL ADDRESS. 39 



1. O. aurantiaca, Gillies. 



2. O. imbricata, P. DC. 



3. O. nigricans, Haw. 



4. O. inermis, P. DO. var. 



5. O. ficus-indica, Mill. 



6. O. tomentosa, Salm-Dyck. 



7. O. monacantha, Haw. 



8. O. Dillenii, P. DO. 



9. O. microdasys, Lehm. 



10. Opuntia sp. A coarse species rare in Scone, New 

 South Wales, bearing formidable spines, and with large, 

 barrel-shaped orange fruits. I have seen what appears to 

 be the same species from the railway train in the Rock- 

 hampton district, Queensland, but so far I have not been 

 able to get specimens to make certain. It has affinities 

 with O. ficus-indica or at least O. amyclea, Ten. It 

 probably belongs to a very numerous group of Mexican 

 species whose affinities are not well ascertained. 



11. Nopalea (Opuntia) dejecta, Salm-Dyck. 



The "O. tuna" of New South Wales Prickly Pear legis- 

 lation is O. nigricans. Similarly "O. vulgaris" is really 

 O. inermis, var., our Pest Pear, the true O. vulgaris being 

 not known out of perhaps one botanic garden. "O. brasil- 

 iensis" of the same legislation does not occur in Australia 

 except in one botanic garden. 



One of the first duties to be undertaken by each State 

 is to map out its pear-affected areas, and specimens of each 

 pear should be authentically named. I have received 

 information, on what appears to be good authority, that 

 there are in Queensland two Opuntias not in the above list 

 which are well acclimatised, and there may be more, but 

 as I have not been able to get specimens, I cannot express 

 an opinion. 



