Fig. 3.

Characteristics of the shape and arrangement of cambial cells of three arborescent monocots. a Tangential sections through the monocot cambium of A. dichotoma, D. draco, and Y. brevifolia showing the semi-storied arrangement. Examples of stories are indicated with dotted horizontal lines. b Drawings made on the basis of sections with polygonal (2D) representation of cells. Monocot cambium cells are represented as n-sided polygons depending on the number of sides they possess, i.e., 4-sided (yellow), 5-sided (orange), 6-sided (gray), 7-sided (green), 8-sided (light green). In the central scheme, the way of measurement of the polygonal cell (length and width) is illustrated. c Scheme showing three-dimensional shape of the monocot cambium cell (14-sided; seven contacts marked 1–7 are visible, but the remaining seven are not), and corresponding views of the ends and body regions of cells as viewed in transverse sections through the monocot cambium of Y. brevifolia