芦花
lúhuā · HSK 7
Reed
🌾 芦 reed + 花 flower = the fluffy white plume on top of a reed
芦 (lú) is the reed plant and 花 (huā) means flower or blossom, so 芦花 is the feathery reed flower. The huā ending also tags the soft, downy seed-tuft that crowns the stalk.
花 — grass radical 艹 + 化 (change/phonetic)
花 is a semantic-phonetic compound. The top 艹 (grass) signals the plant meaning, while 化 ('change, transform') gives the sound and hints at how buds change into blossoms. It originally meant 'flower' or 'blossom' and later extended to 'flowery, patterned, to spend.'