ovatum

Updated: June 1, 2025

This peculiar type of pith is observed in living plants of very different families, such as the common Walnut and the White Jasmine, in which the pith becomes so reduced as simply to form a thin lining of the medullary cavity, across which transverse plates of pith extend horizontally, so as to divide the cylindrical hollow into discoid interspaces. Trigonocarpum ovatum, Lindley and Hutton.

Sir Charles Lyell - The Student's Elements of Geology