CONTENTS. Xlii 



CHAPTER PACK 



V. Tissues. Reactions for Cellulose, Sugar, Inuline, Nitrates, 

 Tannin, Lignin. Mineral bodies. Thickening of the 

 Cell-wall. Pits . . * , v .; ... 62 

 Fig. 23. Stone-cells (sclerenchyma) from fruit of Pear . 66 

 24. Striate cell from pith of tuber of Dahlia variabilis 68 

 , , 25. Sphaero-crystals of Inuline in tuber of Dahlia vari- 



abilis .69 



,, 26. Thickened and pitted walls from endosperm of 



Omithogalum umbellatum, .... 73 

 ,, 27. Bordered pits of Pinus sylvestris .... 76 



VI. The Epidermis, Stomata, Water-Stomata . , ; . .80 



Fig. 28. Epidermis and stoma of leaf of Iris florentina . 81 

 29. Hand microtome of E. Leitz . . . .82 



,, 30. Epidermis and stoma of leaf of Tradescantia vir- 



ginica 85 



31. Epidermis and stoma of leaf of Aloe nigricans . 87 

 ,, 32. Epidermis and water stoma of leaf of Tropceolum 



majus . . . .... : .88 



VII. The Epidermis (con*.); Hairs. Mucilage. Wax. . . 90 



Fig. 33. Hair of Cheiranthus Cheiri, and of Matihiola 



annita . . . . ; \ '^ ' . . 91 



34. Hair from petal of Viola tricolor .... 92 



,, 35. Scales from leaf of Shepherdia canadensis . . 94 



36. Stinging hair of Urtica dioica . . ..,,. 96 



37. Stipular gland of Viola tricolor .... 98 



,, 38. Glandular Hair from bud-scale of ^Esculus Hip- 



pocastanum ....... 99 



39. Wax on node of stem of Saccharum officinarum . 100 



VIII. The Monocotyledonous Stem, and closed collateral 



vascular bundles ".'** ' ^^ 



Fig. 40. Cross-section of vascular bundle in stem of Zea 



Mais .103 



,, 41. Radial section of same 108 



42. Cross-section of vascular bundle from leaf of Iris 



ftorentina . . . . - : . < . . 115 



43. Crystals of oxalate of lime ..... 117 



,, 44. Cross-section of stem of Dracaena rubra .. , 118 



IX. Open collateral vascular bundles. Latex, Bicollateral 

 bundles. Structure of Sieve-tubes. The thickening of 

 Dicotyledonous stems . . . -. . . . 121 



Fig. 45. Cross-section of vascular bundle in runner of Ran- 



unwdus repens . > . . 122 



,, 46. Latex vessels in bast of Scorzonera hispanica . 125 



47. Sieve-plates of Cucurbita Pepo . . . .128 



,, 48. Cross-section through twig of Aristolochia Sipho . 131 



,, 49. Cross-section of vascular bundle of Aristolochia 



Sipho V .-..:.;-.>.:.>} " 133 



