noun
perennial ryegrass; English ryegrass; winter ryegrass
Refers specifically to the plant species Lolium perenne, a common pasture and lawn grass.
ホソムギは牧草としてよく使われる。
Perennial ryegrass is often used as pasture grass.
この芝生にはホソムギが混ざっている。
This lawn has perennial ryegrass mixed in.
A more general loanword for ryegrass; ホソムギ is the specific Japanese name for Lolium perenne.
Compound of 細 (ほそ, 'thin') and 麦 (むぎ, 'wheat, barley'), likely referring to the slender appearance of the grass. The exact origin is uncertain.