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δ13C values of 506 species from the Asclepiadaceae, Bromeliaceae, Crassulaceae, Cucurbitaceae, Didiereaceae, Euphorbiaceae, Orchidaceae, Polypodiaceae, and Vittariaceae plant families known to contain both C3 and CAM members. Values were selected from Winter (1979), Teeri et al. (1981), Griffiths and Smith (1983), Winter et al. (1983), Earnshaw et al. (1987), and Kluge et al. (1991).
