“…As some evidence indicates that translocation of phenolic substances does not take place to a significant extent, they must be synthesized from alicyclic acids or carbohydrates. Shikimic acid has been detected in the phloem from a young tree, cambium and newly formed sapwood of E. sieberiana (and in other trees, Hasegawa, Nakagawa & Yoshida, 1957), but as it can be formed in shaded E. sieberiana leaves (W. E. Hillis, unpublished work) the acid in the woody tissues could be formed in 8itu.…”