"Fig. 8.6. Cambial variants in which the cambium is or becomes separated into several segments. Four stages in development are shown for each species. <i>Flabellaria</i> has origin of xylem segments outside the original cylinder; these segments are expanded and dispersed by parenchyma proliferation. <i>Serjania corrugata</i> has a xylem cylinder consisting of arcs (in sectional view); the arcs are converted to cylinders. <i>Serjania fuscifolia</i> has cortical bundles; xylem is added to each of these and to the original cylinder."
"(in Fig. 8.4) Conventions for this and other figures in this chapter: <i>black</i> phloem, <i>blank</i> (with <i>circles</i> indicating vessels) xylem; <i>stippled</i> axial parenchyma, <i>vertical or variously diagonal lines in pairs</i> rays."
S Carlquist (1988)
S Carlquist (1988) p.271 Fig. 8.6. "Chapter 8. Cambial Variants (Anomalous Secondary Growth)". In: <i>Comparative Wood Anatomy</i>. Part of the series <i>Springer Series in Wood Science</i>. Springer Verlag Berlin Heidelberg.