noun
grey mangrove; white mangrove
Refers specifically to the mangrove species Avicennia marina. The name literally means 'mangrove deceiver', possibly because it resembles true mangroves (ヒルギ) but belongs to a different family.
ヒルギダマシは汽水域に生える植物だ。
The grey mangrove is a plant that grows in brackish water areas.
この海岸にはヒルギダマシの群落が見られる。
A community of grey mangroves can be seen on this coast.
ヒルギ refers to true mangroves (Rhizophoraceae), while ヒルギダマシ is a different species (Avicennia marina) that resembles them.
Compound of ヒルギ (mangrove) + 騙し (deceiving). The name suggests it is a 'false mangrove', as it looks like a true mangrove but belongs to a different genus.