A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA Author Wheeler, Elisabeth A. Author Manchester, Steven R. Author Baas, Pieter text PaleoBios 2023 2023-11-01 40 14 1 55 http://dx.doi.org/10.5070/p9401462457 journal article 10.5070/P9401462457 0031-0298 URTICALEOXYLON GEN. NOV. Diagnosis— Growth ring boundaries marked by marginal parenchyma. Wood semi-ring-porous to diffuse porous, vessels solitary and in radial multiples of 2–3, rarely more. Perforation plates exclusively simple. Intervessel pits alternate, medium to large in horizontal diameter; vessel-ray parenchyma pits oval to horizontally elongate, simple or with reduced borders. Non-septate and septate fibers present. Axial parenchyma marginal, scanty paratracheal, vasicentric, and in latewood some aliform-confluent. Rays homocellular composed of pro- cumbent cells to heterocellular with one (rarely more) marginal row of upright to square cells. Crystals, if present, in marginal ray cells. Etymology— Name to indicate a wood with features found in urticalean families.