Plerandreoxylon, WHEELER & MANCHESTER 2002

Wheeler, Elisabeth A., Manchester, Steven R. & Baas, Pieter, 2023, A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA, PaleoBios 40 (14), pp. 1-55 : 40

PLERANDREOXYLON WHEELER & MANCHESTER 2002 EMEND WHEELER, MANCHESTER, BAAS

Emended diagnosis— Wood semi-ring-porous to ring-porous. Earlywood vessels in multiple rows, usually less than 100 µm in tangential diameter; latewood vessels in discontinuous wavy tangential bands or diagonal to oblique arrangement. Perforations simple or simple and scalariform with fewer than 20 bars; intervessel pits alternate to scalariform, medium to large in horizontal diameter; vessel-ray parenchyma pits with reduced borders to simple.

Fibers septate or septate and non-septate.

Axial parenchyma rare to scanty paratracheal.

Rays multiseriate, less than 10-seriate and averaging less than 700 µm high, heterocellular, sheath cells occasionally present; uniseriate rays not common; fewer than 10 rays per mm.

Crystals, oil/mucilage cells, storied structure, and radial canals absent.