Appendix. 331 
5. Page ııı. Biology of lowland trees, 
From the far-extending, partially buried roots of Zaurelia novae-zelandiae, 
“knees”, or solid upright projections, which are probably pneumatophores, 
rise up out of the shallow water, or muddy soil. Much smaller, cylindrical 
root-branches, also presumably pneumatophores, have recently (1920) been 
described by CHEESEMAN for Eugenia maire. Apparently, from what I have 
seen of these organs, they show every transition from ordinary roots, which 
enter the ground, to those described by the above botanist as erect; those 
horizontal in direction are a common feature. . 
6. Page 127. Aymenophyllaceae of rain-forest. 
Besides the Hymenophyllaceae mentioned in the descriptions of various 
classes of forest the following are usually abundant: Aymenophyllum flabellatum 
(epiphytic), 7. tundridgense, H. bivalve, and Trichomanes venosum (epiphytic 
on trunks of tree-ferns). ZH. pulcherrimum (tufted epiphyte) is fairly common 
in montane and lower subalpine forests in the Central Province, but it is parti- 
cularly plentiful in the south and west of the South Island. 
7. Page ı37. The forest of Banks Peninsula. 
The suggested explanation of the presence of Podocarpus totara forest on 
Banks Peninsula, and of the scanty representation of Dacrydium cupressinum 
and species of Nothofagus, is not clearly expressed. What is meant is this: 
that (1) the primitive forest of Banks Peninsula was Nothofagus; that (2), during 
a wet post-glacial period that genus was almost replaced by Dacrydium 
cupressinum; and’ that (3), during the subsequent drier cycle — a climate 
however not dry enough to give the supremacy to Nothofagus — Podocarpus 
totara replaced D. eupressinum, but did not interfere with Norkofagus. 
8. Page 148, fig. 38. 
This figure belongs to Section III, p. 179, lese the relation of the wind- 5 
factor to forest and tussock-steppe is briefly indicated. 
9. Page 150. Species of gumlands’ heath. 
Leptospermum heath is the especial habitat for certain ER orchide. 3 
The gumlands’ heath in the north of the North Auckland botanical district 
is ee rich in such plants as the following list shows: Thelymitra 
ixioides, T. longifolia, T. intermedia, T. pulchella, T. imberbis, ?. Matthewsiü, 
Ontkaceras strictum, Microtis uniflora, Prasophylium Colensoi, or an allied fe 
P. barbata, Caladenia minor, C. exigua, are cornuta, and 
cifera (rare). 
ı0. Page 153. Fern- heath. 
> 
orm 
not‘ yet described, P. pumilum, Caleana minor (rare), Pterostylis trulli folin, u 
There is a belt of fern-heath in many Me on the lower een 6 ie “ 
mountains surrounding Lakes Wanaka and Wakatipu. Judging from en i 
2 ee this association and ER it; seems not. Kamay! that the 
