| Family | Ranunculaceae |
| Subfamily | Ranunculoideae |
| Tribe | Anemoneae |
| Scientific name | Clematis patens C. Morren & Decaisne |
| Synonyms | Clematis azurea hort. ex Turczaninow; Clematis coerulea Lindley; Clematis fortunei T. Moore; Clematis patens C. Morren & Decaisne forma alba Makino; Clematis patens C. Morren & Decaisne forma coerulescens Makino; Clematis patens C. Morren & Decaisne var. monstrosa Planchon |
| Common name | (Japanese common name) kazaguruma (カザグルマ, 風車 [meaning: pinwheel]) |
| (English common name) clematis, lilac clematis | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) Korea, China | |
| Habitat | Mountane field, swamp, riverside |
| Chromosomal number | unknown |
| Description | Leaves palmate to 3-5 leaflets, each leaflet 4-8cm long. Flowers pedicels 5-15cm long, 8 red, purple, pink or white calyxs each 4-7mm long, flowering in May to June. Fruits ca. 5mm long. Deciduous. Vine. Subshrub or perennial plants. |
| Reference | Clematis patens C. Morren & Decne. |
| May 2007 at my home |
May 2007 at my home |
| Original habitat: Nikko | Original habitat: Nikko | Original habitat: Hiroshima |
| May 2007 at Tsukuba Botanical Garden |
May 2007 at Tsukuba Botanical Garden |
May 2007 at Tsukuba Botanical Garden |
| Original habitat: Oume (Tokyo) | Original habitat: Ibaraki |
| May 2007 at Tsukuba Botanical Garden |
May 2007 at Tsukuba Botanical Garden |