noun
red flower
General term for any red flower; not limited to a specific species.
庭に紅花が咲いている。
Red flowers are blooming in the garden.
noun
Specifically the safflower plant (Carthamus tinctorius), often used in traditional Chinese medicine and as a dye.
紅花は漢方薬の原料として使われる。
Safflower is used as an ingredient in traditional Chinese medicine.