This single species is the sister group of all other angiosperms, and for this reason sometimes called the most "basal" lineage of flowering plants.
- New Caledonia – very interesting because it is home to many endemic angiosperms and interesting gymnosperms, including members of the conifer families Podocarpaceae and Araucariaceae
Amborella is a rainforest understory shrub
- Small flowers, plants dioecious, other parts sterile, stamens are leaflike, but whorls grade into each other (not distinctive whorls)
- Primitive characters: wood vesselless, perianth parts undifferentiated, spiral, indefinite in number, pistils simple (single carpel).
- Derived characters: flowers unisexual, carpels in a single whorl, pollen inaperturate (?)