Furthermore, there is a complicated story. There is an Iridacea plant (as well as Hana-shōbu) called, Ayame[菖蒲 or 文目（アヤメ）](Iris sanguinea). Ayame is written as "菖蒲" as well as Shōbu. Moreover, The word "Ayame" refered to "Shōbu(sweet flag)" in ancient times.
There are some differences between Ayame and Hana-shōbu. Ayame grows in dry grounds and blooms from late April to early May.And its flower has mesh patterns in the center. Hana-shōbu grows in wetlands and blooms from late May to late June.
Kakitsubata[燕子花 or 杜若（カキツバタ）](Iris laevigata) also resembles Hana-shōbu. Its flower has white lines in the center part but Hana-shōbu has yellow lines.
Hana-shōbu(hereinafter referred as to "Shōbu") is a garden species of No-hana-shōbu[ノハナショウブ] which is native to East Asia. There are many species produced at home and abroad now.
Species of Shōbu made in Japan is mainly classified into the following 4 types;
the Edo[江戸（えど）](They have been made around Tokyo in the Edo Period, there are various forms.),
Higo[肥後（ひご）](From Kumamoto, they have been made for potted plants),
Ise[伊勢（いせ）] (From Mie, they have been made for potted plants),
Nagai[長井（ながい）](They were discovered in Nagai City, Yamagata).
There are many spots of Shōbu throughout Japan. And many Japanese painters drew that. In Tokyo, Meiji Shrine Gyoen Garden[明治神宮御苑（めいじじんぐうぎょえん）](Sibuya City), Horikiri Shōbu-en[堀切菖蒲園（ほりきりしょうぶえん）](Katsushika City) and Mizumoto Park(Katsushika City) are famous as spots of Shōbu.
Left: Hasui Kawase, "Shōbu-da in Meiji Shrine"[川瀬巴水『明治神宮 菖蒲田』（かわせはすい『めいじじんぐう しょうぶだ』）]
Right: Shōbu garden at Meiji Shrine Gyoen
Hiroshige Utagawa, "Horikiri no Hana-shōbu
from 100 Famous Views in Edo[江戸名所百景 - 堀切の花菖蒲（えどめいしょひゃっけい - ほりきりのはなしょうぶ）]"
Kiitsu Suzuki, "Hana-shōbu ni ga-zu(Irises and Moth)
The Metropolitan Museum of Art, USA