两个都不对： 应该是“葵花子”或“葵花籽”。 瓜子，指的是“瓜的子”，比如西瓜子，南瓜子。单说“瓜子”的话，大家也习惯把葵花子也叫成瓜子，但是，如果你要加上“葵”字，那就要说成“葵花”，而不是“葵瓜”，因为并没有葵瓜这种东西。 “子”是种子的意思，而“籽”则是特指那某些植物颗粒状的种子，当然象鱼卵、青蛙卵等等也被叫成籽，它们产卵就叫成“摆籽”（应该是北方方言吧）。所以，葵花的种子肯定是可以用“籽”的。

Hi Allen, 葵瓜子 are sunflower seeds. You can use them anywhere/anytime you're talking about sunflower seeds. This term doesn't commonly use the character 籽 for "seed," although I think 籽 might be used when referring to the seeds themselves while still in the flower and not the food (but I cannot be 100% sure about this).