noun
flower head; capitulum
Botanical term for a dense cluster of small flowers (florets) that together resemble a single flower, as in daisies and sunflowers.
ヒマワリの頭状花は、たくさんの小さな花の集まりです。
The sunflower's flower head is a cluster of many small flowers.
Compound of 頭状 (head-shaped) + 花 (flower). The term is a direct calque from Western botanical terminology.