cat's whiskers; Cleome gynandra
A flowering plant native to Africa and Asia, also known as spider flower or African cabbage. The Japanese name literally means 'wind butterfly grass'.
Cat's whiskers bloom with white or pink flowers in summer.
Cat's whiskers have gone wild around here.
The Japanese name 風蝶草 (fūchōsō) is a compound of 風 (wind), 蝶 (butterfly), and 草 (grass/herb), likely referring to the flower's delicate, butterfly-like appearance swaying in the wind. The exact origin is uncertain.