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| September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
| Family | Gentianaceae |
| Tribe | Gentianeae |
| Subtribe | Gentianinae |
| Scientific name | Tripterospermum trinervium (Thunberg) H. Ohashi & H. Nakai |
| Synonyms | Convolvulus trinervius Thunberg; Tripterospermum japonicum (Siebold & Zuccarini) Maximovicz; Tripterospermum japonicum (Siebold & Zuccarini) Maximovicz var. tenue (Masamune) Honda |
| Common name | (Japanese common name) turu-rindou (ツルリンドウ, 蔓竜胆 [meaning: crimbing gentiana]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) Russia (Far East), Korea, China, Taiwan | |
| Habitat | Mountane forest edge |
| Chromosomal number | 2n=46 |
| Description | Leaves 3-8cm long, 1-3cm wide, petioles 5-15mm long. Flowers calyxs 15-20mm long, pale purple or white corollas 2.5-3cm long, 5 stamens, flowering in August to October. Vine. Perennial plants. |
| Reference | Tripterospermum japonicum (Siebold & Zucc.) Maxim. |
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| September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
September 2008 at Mt. Tsukuba |
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| September 2008 at Mt. Tsukuba |
