Sources of information used to compile this key
Sophora chathamic
Island distributions follow these sources:
| Kermadec Islands: | Sykes 1977, Sykes & West 1996. |
| Three Kings Islands: | Oliver1948 |
| North, South, Stewart, Chatham Islands: | Parsons et al. 1995 |
| Auckland Islands: | Johnson & Campbell 1975 |
| Antipodes Islands: | Godley 1989 |
| Campbell Island: | Meurk & Given (unpublished) |
Common names for naturalised plants follow Healy & Edgar (1977), Webb et al. (1987), and where naturalised genera post-date these, from Ogle (2002) and Ngā Tipu o Aotearoa (Allan Herbarium 2000).. In addition some English common names have been found on the web, particularly Wikipedia. Common names for native plants were not provided in Allan (1961). As there are many dialectical Māori names for New Zealand plants, they have been used sparingly.
Scoring of the key was done from many sources. The Flora of New Zealand series, particularly volumes 3 and 4 were the starting point for scoring. Cheeseman's 1925 flora was also useful. For many of the casual genera, the Flora of China (efloras 2008) was the main source of information. Dawson & Lucas (2011) was useful for scoring native tree genera. Leaf lengths and widths were checked in the Allan Herbarium, particularly where ranges were not available from the Flora of New Zealand series.