Lithocarpoxylon ashwillii E.A.Wheeler et Manchester

Plant Fossil Names Registry Number: PFN002680


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: 308

Illustrations or figures: text-fig. 5a–g


Original diagnosis/description

Growth rings distinct. Semi-ring-porous to diffuse-porous. Exclusively solitary vessels in a diagonal to radial arrangement. Simple perforation plates. Vesselray parenchyma pits with reduced borders, often vertically elongate. Vasicentric tracheids present. Axial parenchyma diffuse, diffuse-in-aggregates and in uniseriate lines. Nonseptate fibers. Uniseriate rays and aggregate rays composed of loosely associated narrow rays.


Named for Melvin Ashwill, who alerted S. R. Manchester to these woods.


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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