Vitis flexuosa

Vitis flexuosa is a species of liana in the grape family.

It has a very large native range in Asian tropical and temperate climate zones.

Distribution
The vine is native to:
 * East Asia in Taiwan; the Koreas, Hong Kong; the Chinese provinces of Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Sichuan, Yunnan, and Zhejiang; and the Japanese prefectures of Hokkaido, Honshu, Kyushu, Shikoku, and the Ryukyu Islands.
 * Southeast Asia in Laos, Thailand, and Vietnam.
 * Malesia in the Philippines.
 * Indian Subcontinent in the Indian states of Assam, Himachal Pradesh, Jammu and Kashmir, Manipur, Uttar Pradesh and West Bengal; Nepal; northern Pakistan.

Flexuosol A is a stilbene tetramer found in V. flexuosa.