DESCRIPTION OF PLATES. Vll 



FIG. PAGE. 



39. Cuticle of wheat straw with stomates 18 



40. Cuticle from petal of geranium (Pelargonium) .... 18-19 



41. Cuticle from leaf of a species of aloe 18 



42. Spiral vessel from leaf-stalk of garden rhubarb. ... 20 



43. Ditto unrolled 20 



44. Annular vessel from wheat root 20-28 



45. Dichotomous spiral vessels 20 



46. Dotted duct 19 



47. Scalariform tissue from fern root 20 



48. Woody fibre from elder 19 



PLATE III. 



49. " Glandular " woody tissue 19 



50. Transverse section of woody tissue 19 



51. Transverse section of oak ; 19 



52. Long section of oak 19 



53. Oblique section of oak , . . . 19 



54. Section of cork 21 



55. Transverse section of coal 21 



56. Longitudinal section of coal 21 



57. Wheat starch 22 



58. Oat starch 22 



59. Potato starch 22 



60. Tous-les-mois starch * 22 



61. Indian corn starch 23 



62. Sago starch 22 



63. Tapioca starch 22 



64. Acicular raphides from garden hyacinth 23 



65. Bundle of ditto contained in a cell 23 



66. Compound raphides 24 



