fosteri:[4] Ruehssia cundurango is a species of plant of the genus Ruehssia native to Colombia, Ecuador and Peru in South America.

[5] The subspecies Ruehssia cundurango subsp.

cundurango (synonym Marsdenia cundurango) is known to contain conduritol, a cyclitol or cyclic polyol.

It was first isolated in 1908 by K. Kübler from the bark of the vine.

[6] As of November 2023[update], Plants of the World Online accepted two subspecies:[2]