1858 Sept. 179/2 The ceaseless sap motion keeps up a vacuum in the leaf sap for all these gasses.
1955 11 June 1438/1 Nicotine is present in fresh tobacco leaf together with the minor alkaloids as soluble salts in the leaf sap.
2006 D. R. Katerere & J. N. Eloff in xi. 213 The leaf sap is used to treat wounds, burns, rashes, and ringworm.