| Family | Hemerocallidaceae (also placed in Liliaceae) |
| Scientific name | Hemerocallis middendorffii Trautvetter & C. A. Meyer |
| Synonyms | Hemerocallis dumortieri C. Morren var. middendorffii (Trautvetter & C. A. Meyer) Kitamura |
| Common name | (Japanese common name) oh-zenteika (オオゼンテイカ, 大禅庭花 [meaning: large Zen garden flower]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido |
| (Other nations) Russia (Far East), Korea, China | |
| Habitat | Fields |
| Chromosomal number | 2n=22 (2x) |
| Description | Leaves ca. 60-90cm long, ca. 10-20mm wide. Scapes electing 60-120cm tall. Flowers yellow perianths ca. 7cm, flowering in June to July. Fruits ca. 2-2.5cm long. Perennial plants. |
| Reference | Hemerocallis middendorffii Trautv. & C. A. Mey. var. middendorffi |
| Hemerocallis middendorffii Trautvetter & C. A. Meyer |
| June 2008 at Hokkaido University Botanical Garden |
June 2008 at Hokkaido University Botanical Garden |
June 2008 at Hokkaido University Botanical Garden |
| June 2008 at Hokkaido University Botanical Garden |
June 2008 at Hokkaido University Botanical Garden |
June 2008 at Hokkaido University Botanical Garden |
| September 2008 at Hokkaido University Botanical Garden |