| Family | HYPERICACEAE |
| Genus species | Hypericum gracillimum Koidz. sect. Hypericum |
| Bibliography | Bot. Mag. (Tokyo) 43: 398 (1929) |
| Native Range | Japan (n. & c. Honshu) |
| Primary Biome | Temperate |
| Habitat | grassland |
| Description | leaves subsessile, ascendent, 2-5cm, lanceolate to oblong, obtuse, flat, broadly cuneate, cymes 1-9-flowered, inflorescence narrowly cylindrical, flowers 12-16mm |
| Size | 15-40cm |
| Color | yellow |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | mesic, slightly humous, sunny site alpine house, moist, rich, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 10-16°C division in spring; cuttings in late summer |
| Synonyms | Hypericum conjunctum var. longistylum Y.Kimura Hypericum erectum var. longistylum (Y.Kimura) Y.Kimura Hypericum erectum var. subalpinum (Y.Kimura) Y.Kimura Hypericum kinashianum var. longistylum (Y.Kimura) Y.Kimura Hypericum muraianum Makino Hypericum pseudopetiolatum var. muraianum (Makino) Y.Kimura Hypericum subalpinum Y.Kimura Hypericum subalpinum var. longistylum Y.Kimura Hypericum subrotundifolium var. kasiense H.Koidz. Hypericum swertioides H.Koidz. |
| Territory | 3 Asia-Temperate 38 Eastern Asia (JAP Japan) |