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Detailed Information

The Japanese Morning Glory (Ipomoea nil ‘Seiryu’), while commonly known as “Japanese” and having a rich history in Japanese horticulture, actually originates from **tropical America**.

Here’s the breakdown:

* **Ipomoea nil (the species):** Native to tropical America.
* **’Seiryu’ (the cultivar):** Developed and extensively bred in Japan.

Therefore, while the cultivar ‘Seiryu’ is strongly associated with Japan, the *species* *Ipomoea nil* from which it was bred comes from tropical America.