Hamamelidoxylon crystalliferum E.A.Wheeler et Manchester

Plant Fossil Names Registry Number: PFN002681

Act LSID: urn:lsid:plantfossilnames.org:act:2681

Authors: E. A. Wheeler & S. R. Manchester

Rank: species

Reference: Wheeler, E. A. & Manchester, S. R. (2022): A diverse assemblage of Late Eocene woods from Oregon, western USA. – Fossil Imprint 77(2): 299–329.

Page of description: 312

Illustrations or figures: text-fig. 7a–i


Holotype UF 279-34464, Paleobotany Collections, Florida Museum of Natural History, Gainesville, Florida, USA
Figures: text-fig. 7a–i

Note: Paratype: UF 279-24555.

Original diagnosis/description

Growth rings distinct to indistinct. Wood diffuse-porous. Vessels predominantly solitary, narrow, and numerous. Perforation plates exclusively scalariform, fewer than 20 bars per perforation plate. Intervessel pitting scalariform. Vessel-ray parenchyma pits with reduced borders and horizontally elongate. Fibers non-septate, with bordered pits on radial walls. Axial parenchyma rare. Heterocellular rays, 1–2 cells wide. Solitary prismatic crystals in chambered and non-chambered square to upright ray cells, crystal-containing cells somewhat inflated.


Named for crystals in this wood


Paleogene, Eocene
John Day Formation


United States
UF 279, about 3 km east of Post, Crook County, Oregon

Plant fossil remain

fossil wood


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