Phlomis tuberosa), the sage-leaf mullein,[2] is a perennial herbaceous flowering plant in the family Lamiaceae, native to China, Kazakhstan, Kyrgyzstan, Mongolia, Russia; SW Asia and Europe.

Enlarged, tuberous roots give rise to erect stems to 150 cm bearing purple-red flowers.

[3] Phytochemical analyses of Phlomoides tuberosa leaves have found flavonoids apigenin, apigenin-7-O-glucuronide, luteolin, luteolin-7-O-glucoside, luteolin-7-О-glucuronide, orientin, isoorientin,[4][5][6][7] phenylpropanoids acteoside (verbascoside), forsythoside B,[8] decaffeoyl-acteoside, leucosceptoside A, marthynoside, neolignanes,[9] iridoids sesamoside, 5-desoxy-sesamoside, shanzhiside methyl ester, lamalbide,[10] 8-O-acetyl-shanzhiside, phloyoside I, chlorotuberoside,[9] sterols, triterpenes oleanolic acid, ursolic acid.

[11] Dried leaves of plants collected in Buryatia yielded 0.02% of essential oil with a weak aroma with dominant phytol, linalool, eugenol and caryophyllene oxide.

[17] Another source for Mongolia has the plant used as a folk restorative medicine against intoxication, tuberculosis, pulmonary and cardiovascular diseases and rheumatoid arthritis.