Olivia here,
I have just come back from a drive to enjoy the view of Cosmos in 俵山交流館 萌の里 (Tawarayama Koryukan Moe no Sato)
Cosmos has kanji writings “秋桜” , meaning Autumn Cherry blossoms.
My first impression of Cosmos when I first saw them last year was that their stems were thin, yet they could last for quite a while even after few rainy days.