Abstract
The examination of the primary xylem of roots of Nelumbo has revealed the presence of vessel elements with intra‐face, transversely‐rowed to obliquely‐rowed bordered pitted side walls and scalariformly perforated end walls. Whole mounts of macerated xylem, serial sections of roots, and cells through which a water suspension of India ink particles under slight or no pressure was passed, were the means of investigation. It is our opinion that this discovery does not support theories which derive monocotyledons from the Nymphaeaceae. A discussion leading to this conclusion is presented.
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