Herbs that Warm the Interior

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Which of the following herbs can descend floating heat, treating such conditions as Kidney and Heart not communicating, heat above with cold below, or false heat with true cold?
When yang is deficient, it can float upwards and cause heat signs in the upper body while the lower body is cold. Rou Gui can be taken internally, or ground into a powder and applied as a paste at KI-1.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. p. 685 [Q63]