トサミズキ Spike winter hazel

トサミズキは、ヒュウガミズキとよく似ていますが、雄しべの先端がトザミズキは赤色、ヒュウガミズキは黄色です。雄しべの先端は花粉を入れる袋状の構造になっており、葯（やく）と呼ばれます。

A "Spike winter hazel" is similar to a "Buttercup winter hazel", but the tip of the stamen is red for a "Spike winter hazel" and yellow for a "Buttercup winter hazel."
The tip of the stamen has a bag-like structure that contains pollen, and is called anther.