332 ^'"■■" 



7. Caleana, R. Br. Australia 4, New Zealand 1 (in common with Aus- 



tralia). Total 4, 3 of which are endemic. 



8. Acianthiis, R. Br. Australia 5 (endemic), New Zealand 1 (endemic), 



New Caledonia 12 (endemic). <^^"^ Total 18, endemic. 



9. Lyperanthus, R. Br. Australia 5 (endemic). New Zealand 1 (endemic). 



New Caledonia 7 (endemic). Total 13, endemic. 



10. Cyrtostylis, R. Br. Australia 1 (endemic). New Zealand 1 (endemic). 



Total, 2, endemic. 



11. Caladenia, R. Br. Australia 56, New Zealand 4 (endemic), New 



Caledonia 1 (in common with Australia), Java 1 (in common with 

 Australia), Timor 1 (doubtful). Total 60 or 61, of which 58 are 

 endemic to Australia. 



12. Adenochilus, Hook. f. Australia 1 (endemic). New- Zealand 1 



(endemic). Total 2, endemic. 



13. Chiloglottis, R. Br. Australia 7, New Zealand 2 (of which 1 is endemic 



and 1 common with Australia). Total 8, of which 7 are endemic. 



It is important to notice that the closest affinity of Australia's typical genera- 

 is clearly with New Zealand, where all are represented, and no less than 9 of 

 them by one or more species common to the two countries, the remaining 4 being" 

 represented by species endemic to New Zealand. Thelymitra and Pterostylis' 

 have undergone considerable development in the Dominion, each of them com- 

 prising 12 species. 



It is significant also, that from only one other station in the South-east 

 Pacific, have any of our typical genera been reported, vis., New Caledonia, where" 

 7 of these emigrants have become resident. Out of this number four are repre- 

 sented by species in common with this country, vis., Thelymitra, Microtis,^ 

 Pterostylis, and Caladenia, and the others by a considerable number of endemic 

 forms, Acianthus comprising 12, and Lyperanthus 7. 



It may seem rather remarkable that New Caledonia, which, according tO' 

 the present disposition of land areas, is only about 700 miles distant from the: 

 nearest coastline of the Commonwealth, should contain relatively such a smaller 

 proportion of our orchid-flora than New Zealand, which is further removed.. 

 It must be remembered, however, that apart from the difiference in superficial 

 area of the two places, the botany of the former island has been much less 

 thoroughly investigated than that of the other ; and further, that the genera under 

 consideration are much more generously developed in the south-eastern portion of 

 Australia than in Queensland. 



Three of the above types — Thelymitra, Microtis, and Caladenia — have 

 reached the Malay Archipelago, where they are represented monotypically, one 

 by an endemic and the other two of them by Australian species. 



So far, only one genus, Pterostylis, has been reported from New Guinea, 

 but it is by no means improbable that others will be discovered soon. Both of 

 these were collected at great altitudes. 



Only two genera appear to have migrated to any considerable distance from 

 their native habitat, vis., Thelymitra and Microtis. Both of . these have been 

 recorded from the Philippines by Ames,*^^^^ the former being represented by a 

 Javanese species, and the latter by a plant supposed to be conspecific with 

 Microtis porrifola, Spreng., and identical with the Javanese Microtis. The. 



(17) Rendle, I.e., 254. 



(IS) "Orchidaceae," v. (1915), 18. 



