What does "narrow-leaved plantain" mean?

an Old World plantain with long narrow ribbed leaves widely established in temperate regions

Narrow-leaved plantain

Common synonyms include: buckthorn, english plantain, plantago lanceolata, ribgrass, ribwort, ripple-grass.

Rare ·Advanced level

Noun

1
an Old World plantain with long narrow ribbed leaves widely established in temperate regions wordnet