Hig. 20.—The erect breathing-roots of the mangrove (Avicennia officinalis) 
projecting out of the muddy floor of a tidal river near Mangonui (North 
Auckland). In the background are young plants of the mangrove. 
[Photo, L. Cockayne. 
4283 
Fic. 21.—A pohutukawa (WMetrosideros tome nlosa) 
growing as an erect bushy 
tree in the school-grounds at Te Araroa, near the East Cape. 
[Photo, L. Cockayne. 
3*— Plants. 
