64 Transactions. 



together with the outlying islands. It can be naturally subdivided into 

 two subdistricts, a north and a south, but neither their names nor boundaries 

 are given here. 



(3.) The South Auckland Botanical District. — This includes that portion 

 of the North Island lying to the south of the North Auckland District and 

 bounded on the south and south-east by a line extending from Te Reinga 

 Point to about the source of the River Mokau and thence passing Tauranga 

 a little to the south reaches the coast. 



This district may be subdivided into (a) the Waikato Subdistrict, which in- 

 cludes all the area west of the River Thames, and (b) the Thames Subdistrict, 

 which includes all the area to the east of the above river, together with 

 the Little and Great Barrier Islands, and the islets lying off the east coast. 



The southern limit of the district is little better than a guess, especially 

 in its extreme southern portion. 



(4.) The Volcanic Plateau Botanical District.- — Although this district, 

 as a whole, is well-marked, its boundaries are quite uncertain. These are 

 ■ — to the north, the coast from near Tauranga to Opotiki ; on the west the 

 boundary is as already cited for part of the southern boundary of the South 

 Auckland District ; thence it follows the course of the Main Trunk line to 

 a little south of Waiouru ; thence to a little to the east of Kuripaponga, 

 and thence by a fairly straight line through Tarawera and Ruatahuna to 

 Opotiki. Motiti and White Islands are included in this district. 



(5.) The East Cape Botanical District. — This includes all that part of 

 the North Island east of the eastern boundary of the Volcanic Plateau 

 District, with its southern boundary extending from a little to the north of 

 Kuripaponga to a few miles to the south of Cape Kidnappers. Possibly 

 the southern boundary should extend considerably farther to the south, 

 including some of the area south of the southern boundary of the Volcanic 

 Plateau District. 



(6.) The Egmont-W 'anganui Botanical District. — This includes all that area 

 of the North Island lying to the west of the southern part of the Volcanic 

 Plateau District and of a line a little to the south of Waiouru and fol- 

 lowing the Rivers Hautapu and Rangitikei to the sea. On the north it is 

 bounded by part ot the southern boundary of the South Auckland District. 



(7) The RuaMne-Oook Botanical District.- — This includes all the re- 

 maining part of the North Island, together with that portion of the South 

 Island comprising the Marlborough Sounds area, including a narrow strip 

 of land in Nelson subject to the same forest-climate as that of the Marl- 

 borough Sounds. 



The district may be divided into two subdistricts — viz., (a) the Wellington 

 Subdistrict, which includes the North Island portion, and (b) the Marlborough 

 Sounds Subdistrict. which includes all the South Island portion. 



Of the botanical districts already dealt with, the Three Kings and the 

 two Auckland districts make up my Northern Botanical Province, and 

 the remainder my Central Botanical Province. The following botanical 

 districts make up my Southern Botanical Province : — * 



* These provinces were first defined by me in 1907 (Trans. N.Z. Inst., vol. 39, 

 pp. 313-14, in footnote), but, as now defined, the actual boundaries are somewhat 

 different, latitude 3S° S. and. latitude 42° S. being no longer used as the lines separating 

 the Northern and Central Provinces and the Central and Southern Provinces respectively. 

 The other botanical provinces of the New Zealand botanical region, together with their 

 botanical districts in brackets, but not here defined, are : Kermadec Province (Kermadec 

 District); Chatham Province (Chatham District); Subantarctic Province (Snares, Lord 

 Auckland, Campbell, Antipodes, and Macquarie District). 



