noun
lacecap hydrangea
A variety of Hydrangea macrophylla with flat flower heads; the scientific name is Hydrangea macrophylla f. normalis.
庭にガクアジサイが咲いている。
Lacecap hydrangeas are blooming in the garden.
Standard katakana spelling for this plant name.
Kanji spelling is rare; the plant name is almost always written in kana.
アジサイ is the general term for hydrangea, often referring to the common mophead type, while ガクアジサイ specifically denotes the lacecap variety.
The name ガクアジサイ comes from 額 (がく, 'frame' or 'picture frame') + アジサイ ('hydrangea'), referring to the flat ring of showy flowers surrounding the small central blooms, resembling a framed picture.