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| May 2008 at Tsukuba Botanical Garden |
May 2008 at Tsukuba Botanical Garden |
May 2008 at Tsukuba Botanical Garden |
| Family | Apocynaceae (also placed in Asclepiadaceae) |
| Subfamily | Asclepiadoideae |
| Tribe | Asclepiadeae |
| Subtribe | Tylophorinae |
| Scientific name | Vincetoxicum japonicum C. Morren & Decaisne |
| Synonyms | Cynanchum flavescens Siebold ex Lindley & Paxton; Cynanchum grayanum (Maximovicz) Koidzumi; Cynanchum japonicum (C. Morren & Decaisne) Hemsley; Vincetoxicum japonicum C. Morren & Decaisne var. grayanum Maximovicz |
| Common name | (Japanese common name) iyo-kazura (イヨカズラ, 伊予葛 [meaning: Iyo vine (Iyo = an old name of Ehime Prefecture)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) Korea, China | |
| Habitat | Seaside |
| Chromosomal number | unknown |
| Description | Plants electing 30-80cm tall. Leaves 3-10cm long, 2-7cm wide. Flowers pale yellow ca. 8mm, flowering in May to July. Perennial plants. |
| Reference | Vincetoxicum japonicum C.Morren & Decne. ex Decne. var. japonicum |
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| May 2008 at Tsukuba Botanical Garden |
May 2008 at Tsukuba Botanical Garden |
May 2008 at Tsukuba Botanical Garden |
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| April 2009 at Tsukuba Botanical Garden |
