noun
daisy fleabane; annual fleabane
Refers specifically to Erigeron annuus, a common roadside weed with small white daisy-like flowers. Often confused with ハルジオン (Erigeron philadelphicus), which blooms earlier and has slightly different flower characteristics.
道端にヒメジョオンがたくさん咲いている。
A lot of daisy fleabane is blooming by the roadside.
ヒメジョオンとハルジオンの見分け方を教えてもらった。
I was taught how to tell daisy fleabane and Philadelphia fleabane apart.
ハルジオン (Erigeron philadelphicus) blooms in spring, has a hollow stem, and its petals are slightly more thread-like. ヒメジョオン blooms later, has a solid stem, and is more common in summer.
The name ヒメジョオン is a Japanese adaptation of the plant's scientific name or a related name; the exact derivation is uncertain. The kanji 姫女苑 are ateji assigned to the word.