floral zone; herb zone
Ecological term for a vegetation zone dominated by herbaceous plants, typically in alpine or subalpine regions.
高山の草本帯には多様な花が咲く。
A variety of flowers bloom in the alpine herb zone.
Composed of 草本 (herbaceous plant) and 帯 (zone, belt). The exact historical derivation is uncertain, but the term follows standard ecological naming conventions.