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.