However a more recent study provided evidence, and accepted A. cinerea as a vagrant species indigenous to New Zealand.[17] Evidence provided included the movement of fruits by near-shore currents as the most likely method of seed dispersal. Bracteoles of A. cinerea float in salt water for periods of 18-30 days.[17] Further the seeds that were washed in fresh water after previously being immersed in salt water germinated more easily than seeds not subject to salt water immersion. The study concluded that "A. cinerea has always been scarce, its ability to successfully establish here has been hindered by its dioecious habit... its scarcity within New Zealand is primarily a natural rather than induced phenomenon."[17]