| Family | Apocynaceae (also placed in Asclepiadaceae) |
| Subfamily | Asclepiadoideae |
| Tribe | Asclepiadeae |
| Subtribe | Tylophorinae |
| Scientific name | Vincetoxicum sublanceolatum (Miquel) Maximovicz var. macranthum Maximovicz |
| Synonyms | Cynanchum macranthum (Maximovicz) Nakai; Cynanchum franchetii Nakai; Cynanchum sublanceolatum (Miquel) Matsumura var. macranthum (Maximovicz) Matsumovicz |
| Common name | (Japanese common name) shirobana-kamome-duru (シロバナカモメヅル or シロバナカモメズル, 白花鴎蔓 [meaning: white flower seagull vine]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu (north of Kinki region) |
| (Other nations) none | |
| Habitat | Wet field |
| Chromosomal number | 2n=44 |
| Description | Leaves 6-12cm long. Flowers pale green 1-2cm, flowering in June to September. Vine. Perennial plants. |
| Reference | Vincetoxicum sublanceolatum (Miq.) Maxim. var. macranthum (Maxim.) Maxim. |
| Chromosome Numbers of Japanese Asclepiadaceae | |
| Compositions with analgesic, antipyretic and antiinflammatory properties (US Patent 5908628/1999) |
| June 2008 at Institute for Nature Study |
June 2008 at Institute for Nature Study |
June 2008 at Institute for Nature Study |
| June 2008 at Institute for Nature Study |
June 2008 at Institute for Nature Study |