Grey Mangrove

Avicennia marina

It excretes excess sea salt through microscopic glands on its foliage, often coating the undersides of its leaves in visible white salt crystals.

Scientific name
Avicennia marina
Taxonomy
Plantae › Tracheophyta › Magnoliopsida › Lamiales › Acanthaceae › Avicennia
IUCN Red List status
Least Concern
Population trend
decreasing
Biome
wetland
Habitat
Intertidal mudflats, sheltered coastal shores, estuaries, and tidal creeks
Diet
Autotroph (photosynthesis, drawing brackish water and dissolved nutrients from coastal sediment)
Range
Australia, New Zealand, Southeast Asia, South Asia, Arabian Peninsula, East Africa
Size
Shrub to medium tree, typically 3–14 m tall
Lifespan
50–100+ yr
Active
diurnal
Threats
Coastal development, land reclamation, aquaculture pond construction, oil spills, and sea-level rise
Safe to approach?
Harmless to humans. The plant is non-toxic to touch. Take care when walking through mangrove habitats, as the exposed pneumatophores and soft, deep tidal mud create significant tripping and sinking hazards. Avoid trampling or breaking the roots.

Avicennia marina , commonly known as grey mangrove or white mangrove , is a species of mangrove tree classified in the plant family Acanthaceae (formerly in the Verbenaceae or Avicenniaceae). As with other mangroves, it occurs in the intertidal zones of estuarine areas.

Photo: Saryu Mae 前 朝琉, CC-BY, via iNaturalist

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