Perennial dandelion native to Kazakhstan cultivated for its fleshy roots that have high rubber content WordNet 3.0 & Open English WordNet

Taraxacum kok-saghyz, often abbreviated as TKS and commonly referred to as the Kazakh dandelion, rubber root, or Russian dandelion, is a species of dandelion native to Kazakhstan, Kyrgyzstan and Uzbekistan, notable for its production of high-quality rubber. Wikipedia