CONTENTS xv 



PAGE 



B. The Secondary Phloem (Extra-cambial Secondary Tissue) 655 



C. The Secondary Xylem or Woody Cylinder (Intra-cambial 

 Secondary Tissue) ----- 659 



1. The Component Elements of the Secondary Xylem - 659 



2. The Arrangement of Tissues in the Woody Cylinder 669 



3. Annual Rings - - - - - - 675 



4. Normal Changes in the Physical Condition of the 



Wood - ... 684 



III. Secondary Growth in Thickness in Monocotyledons - 686 



B. Anomalous Forms of Secondary Growth in Thickness - 688 



I. General Considerations - - 688 



II. Secondary Growth in Thickness of Liane-stems - - 690 



III. Secondary Growth in Thickness of Fleshy Roots - 696 



IV. NON- ADAPTIVE ANOMALIES OF SECONDARY GROWTH IN THICK- 

 NESS ---------- 698 



List of Abbreviations ... - ... 702 



Notes ... 704 



Subject-Index ------ - - 756 



Index of Plant Names -------- 765 



