PLATE I. [FRONTISPIECE.] 

 VEGETABLE TISSUES, &c. 



Fig. 



1. Leaf of Geranium : cells, chloro- 

 phyll, and intercellular pas- 



2. Cells of Apple. 



3. Starch-granules : a, of Wheat ; 



b, of Arrowroot ; e, of Potato ; 

 d, of Oat; e, of Lentil;/, of Rice. 



4. Cells of Potato, containing Starch. 



5. Garden Rhubarb-stalk : a, ra- 



phides; b, reticulated duct; c, spi- 

 ral vessel ; d, woody fibre ; e, an- 

 nular vessel. 



6. Wood-cells from stem of Chrys- 



anthemum. 



7. Deal, transverse section : a, glan- 



dular tissue ; b, woody fibre. 



8. Deal, longitudinal (radial) sec- 



tion of glandular tissue. 



9. Deal, longitudinal section of woody 



fibre. 



10. Deal, tangential section. 



11. Holly, wood of: a, porous cells; 



b, d,e, wood-cells; c, dotted ducts. 



12. Hairs, vegetable : a, b, of Ground- 



sel ; c, of London Pride ; d, e, of 

 Geranium; /, of Chrysanthe- 

 mum. 



13. Epidermis of Geranium-leaf. 



14. Style of Crocus, with pollen-gra- 



nule and -tube. 



15. Pollen-grain of Crocus, with pol- 



len-tube. 



16. Pollen of Primrose. 



17. Pollen of Sunflower. 



18. Pollen of Convolvulus major. 



19. Caraway-seed. 



20. Needle-point. 



21. Sting of Nettle. 



22. Hair of Spiderwort. 



23. Hair of Spiderwort, single cell. 



Fig. 



24. Epidermis of Geranium-petal. 



25. Petal of Chickweed. 



26. Sepal of Chickweed. 



27. Seed of Poppy. 



28. Epidermis of Deutzia. 



29. Seed of Mignonette. 



30. Pollen of Chickweed, dry. 



31. Pollen of Chickweed, in water. 



32. Flower of Chickweed. 



33. Epidermis of petal of Chickweed. 



34. Hairs of calyx of Chickweed. 



35. Hairs of seed of Collomia. 



36. Stem of Dicotyledon, section of. 



37. Stem of Monocotyledon, section of. 



38. Seed of Shepherd's Purse, trans- 



verse section. 



39. Stamen of Chickweed. 



40. Stigma of Chickweed. 



41. Ovary of Chickweed. 



42. Leaf of Chickweed. 



43. Seed of Wallflower, section of. 



44. Seed of Wallflower, radicle and 



cotyledons. 



45. Embryo-sac of Chickweed. 



46. Embryo-sac of Chickweed. 



47. Embryo-sac of Chickweed. 



48. Wheat, cotyledon and leaves of, 



section. 



49. Mustard-seed, cotyledons and ra- 



dicle. 



50. Mustard-seed, transverse section. 



51. Chickweed, seed of. 



52. Seed of Eccremocarpus scaber. 



53. Grain of Wheat : a, cotyledon ; 



b } embryo ; c, radicle ; d, albu- 

 men. 



54. Ovule of Wallflower. 



55. Cotyledons of Chickweed. 



56. Plum-stone, section of. 



