dulac said:
Here's the paragraph that's been giving me some trouble:
from しょうぶとあやめ (Irises and blue flag)
この端午の節句と関係の深いしょうぶは、はなは美しくありません。 花の美しいのは、はなしょうぶですが、じつはしょうぶが、さといも科の植物であるのに対して、はなしょうぶはあやめ科に属していて別の種類のものです。
この端午の節句と関係の深いショウブは、花は美しくありません。
As to "shoubu" which is closely related to Tango-no-sekku, its flowers are not beautiful.
花の美しいのはハナショウブですが、
It is hana-shoubu that has beautiful flowers
実はショウブがサトイモ科の植物であるのに対して、
While shoubu is of araceae (arum family),
ハナショウブはアヤメ科に属していて
hana-shoubu belongs to iridaceae (iris family)
別の種類のものです。
and is different species (from shoubu).
On Tango-no-sekku, we have a tradition to take a bath called 菖蒲湯(しょうぶゆ) - bunch of fragrant shoubu leaves in a bath tub.
Also we adorn the display of Tango-no-sekku (such as a figure of Kintarou, or a miniature suit of armour) with flowers called 菖蒲(しょうぶ).
The latter is commonly called ショウブ but precisely speaking, its name is not ショウブ but ハナショウブ. Because of its being called ショウブ instead of ハナショウブ, often people mixed up the two, or many do not know there are two and they are different. (Personally there's another reason for this confusion - for 菖蒲湯, only leaves are used and the leaves look quite similar to those of ハナショウブ.)
The paragraph you quoqted is explaining about this "confusion" on ショウブ.
ショウブ(菖蒲)サトイモ科
ショウブ(菖蒲)
ハナショウブ(花菖蒲)アヤメ科
ハナショウブ(花菖蒲)
*This is a very good website to check the name of plants in Japanese.
植物園へようこそ!