TABLE OF CONTENTS. XIU 



PAGE 



I. Bundle-trunks. 



Sect. 100. Synopsis 317 



„ loi. Collateral Bundles 319 



„ 102. Bundles of the Leaves of Cycadeae and Isoeteae 335 



„ 103. BicoUateral Bundles 338 



„ 104-105. Concentric Bundles ... 339 



„ 106. Concentric Bundles of the Ferns 342 



„ 107. Radial Bundles ^48 



„ 108. Radial Bundles of Typical Roots '-^SilN^ 



„ 109. Root-bundles of Abnormal Structure 364 



„ 1 10. Imperfect and Rudimentary Bundle-trunks 366 



2. Ends and Connections of Vascular Bundles. 



„ 1 11. Endings in the Cortex, and in the Foliar Expansions . . . .371 



„ 112. Peculiarities of Leaves of the Coniferse 378 



„ 113. Terminations in Roots and Haustoria <13?3/ 



„ 1 14. Connections of Bundles 385 



C. Development of the Vascular Bundle. 



„ 115. Development of the Individual Bundle 388 



„ 116. Development of the Bundle-system in the Stem. Succession of the 



Bundles. Their Morphological Position J92 



„ 117. Development of the Lateral Roots \^^ 



Concluding Remarks 399 



CHAPTER IX. 



Arrangement of the Primary Parenchyma. 



Sect. 118. General Considerations 402 



„ 119. Pith, Medullary Rays. External Cortex 402 



„ 120. Petioles, Ribs of the Leaf 405 



„ 121. Lamina of the Leaf (Mesophyll, Diachyma) 406 



„ 122. Cortex of the Root, Root-cap CSS^ 



„ 123. Parenchymatous Sheaths, Endodermis, Starch-layer. — Plerome-sheath . 414 



CHAPTER X. 

 Sclerenchyma and Sclerotic Cells. 



Sect. 124. General Considerations 417 



„ 125. Fibrous Layers and Strands 417 



„ 126. Isolated Fibres 423 



„ 127. Short Sclerenchymatous Elements 425 



„ 128. Thorns, Prickles, Warts 425 



„ 129. Sclerotic Elements of the Ferns 426 



CHAPTER XI. 

 Secretory Reservoirs. 



'3° 431 



