Small diameter pyritized axes, commonly referred to as ‘twigs’, of fossil platanaceous wood are described from the
Lower Eocene London Clay Formation of south-east England. These twigs are characterized by solitary vessels with
scalariform perforation plates, opposite intervessel pits, and tall, multiseriate rays that dilate in the phloem region.
The wood anatomy supports close relationship to members of extant Platanaceae and the material is placed in the
organ genus Plataninium Unger erected for fossil woods with close anatomical similarity to Platanus L. This material
supplements the fossil record of platanaceous type wood from the Eocene London Clay and documents the first
record of Plataninium decipiens Brett in the twig flor
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