This is New Zealand is a Garden by Joyce Blake. I was sent a copy by Deb earlier this month, who found it second-hand and thought I might like it. The book was published in 1982 (I've since discovered that the author is Sir Peter Blake's mother) and features sketches and paintings of plants around New Zealand- the locations are a bit random (Northland, Takaka, Wellington, Te Awamutu, Moeraki and a few others) which makes it all the more appealing, I think. Like a proper holiday trip around the place. Deb kindly marked the pages she thought I might especially like.
The fishing hut in Whagaruru (second-to-last picture above) is my favourite: corrugated iron structure with orange tarpaulin roof and casual woodcarving nearby. Deeply familiar though I've never been there.