New Zealand: South Island
local names: –
New Zealand plants have wrongly been called Isotoma fluviatilis (R. Br.) F. Muell. ex Benth. which is an Australian endemic.
The same name is applied in Botanical Gardens to the Australian Lobelia pedunculata R. Br. (Pratia pedunculata (R. Br.) Benth), which is then wrongly labeled as coming from New Zealand.