noun
seaside arrowgrass (Triglochin maritima var. asiatica)
A salt-tolerant plant found in coastal areas. Botanical term; the variety name is sometimes included in scientific contexts.
シバナは海岸近くの湿地に生える多年草です。
Shibana is a perennial plant that grows in wetlands near the coast.
このあたりではシバナの群落が見られます。
You can see colonies of seaside arrowgrass around here.
The name likely derives from the plant's habitat: 塩場 (しおば, 'salt flat') + 菜 (な, 'greens/vegetable'), referring to a plant found in saline environments. The exact historical derivation is uncertain.