Grey Mangrove ( Avicennia marina )
Tree, broadleaf evergreen, broad spreading
Height : .5m to 9m included
Origin : Northwestern Australia, New Zealand, Tropical Pacific
Environment : intertidal zones of estuarine areas
Climate : warm, temperate
Also known as White Mangrove or Manawa (Maori name), this species, like the other Avicennia species, develops aerial roots known as pneumatophores whose task is to let the plant absorb oxygen from the air when the lower roots are soaked in water. If the Mangrove grows on solid dry ground, pneumatophores are usually not developed. Mangroves thrive in a mix of salty and fresh waters, while where the salt concentration is too high they experience stunted growth.