the transparent, milk-white, yellowish brown, yellow, or orange contents of the latex vessels of plants.
A number of plants of the families Euphorbiaceae, Moraceae, and Compositae hold large amounts of latex, which contains (dissolved or suspended) carbohydrates, proteins, glycosides, salts, and essential oils. The characteristic components of the latex of gutta-percha-yielding and rubber-yielding plants are resins, gutta, and natural rubber. The latex of certain plants of the poppy family (Papaveraceae) contains large quantities of alkaloids. The latex of the papaya yields the enzyme papain.