Table 1.

Putative products of sympatric speciation

Species	Node age (million y)*	Approximate elevation range (meters)	Principal habitat	2n†
Coprosma huttoniana (0.80‡)	2.08	437–857	Abundant tree in cloud forests	44
C. lanceolaris	5.04	131–852	Common along wet cliff faces	44
C. putida	1.34	0–860	Understory tree in lowland forest	44
C. inopinata	4.05	760–780	Rare cliff dwelling species	—
C. sp. nov.	1.34	142–532	Exposed north facing sites	44
Howea forsteriana (1.00‡)	1.08	0–400	Common on calcarenite soil	32
H.belmoreana	1.08	0–500	Restricted to volcanic soil	32
Metrosideros nervulosa (1.00‡)	3.53	57–875	Exposed sites above 350m, summits	22
M. sclerocarpa	3.53	10–481	Wet valleys below 350m	22
Polystichum moorei (1.00‡)	4.76	0–50, 400	Under basalt overhangs	—
P. whiteleggei	4.76	300–600	Flanks of mountain summits	—
Alyxia squamulosa (0.16‡)	2.19	600–875	Mountain summits	—
A. lindii	2.19	0–300	Common in northern hills	—
Asplenium milnei (0.54‡)	6.47	0–875	Lowland mixed forest	—
A. pteridoides	1.09	600–875	Forest at high altitudes	—
A. surrogatum	1.09	50–875	Southern wet areas	—
Geniostoma huttonii (0.16‡)	4.37	500–800	Remote ridges of mountains	—
G. petiolosum	4.37	0–500	Sheltered lowland mixed forest	—
Grammitis nudicarpa (0.48‡)	2.93	700–875	Densely shaded areas of summits	—
G. diminuta	2.93	200–875	Cloud forest	—

All species are endemic.

*Values shown are upper 95% CI for time since divergence from nearest relative.

^†Species chromosome number.

^‡Proportion of members of each genus occurring in the five focal regions that were accounted for in this study.