EXPLANATION OF THE PLATES. 



Plate I. Fig. 1. Represents the epidermis of the 

 common Pink, so magnified as to exhibit the exhaling 

 orifices. 2. The epidermis of the Lily magnified to 

 shew the same. 3. The epidermis with areas which 

 contain the evaporating pores of Hedwig. 4. A hori- 

 zontal section of a wood}' stem exhibiting a magnified 

 view of its vessels ; a represents the simple tubes ; b 

 the porous tubes ; c the false spiral tubes ; d the mix- 

 ed tubes. 5. Represents the spiral vessels. 6. The 

 same magnified. 7. A transverse section of a woody 

 stem. 8. The same magnified. 9. A fibrous root. 10. 

 A granulated root. It, A scaly bulbous root. 12. A tu- 

 nicate or coated bulb. 13. A palmate root. 14. The 

 root of Utricularia with numerous air cells, which pre- 

 vent the plant from sinking in water. 15. A creeping 

 root. 



Plate II. Fig. 16. Represents a dichotomous 

 stem with connate perfoliate leaves. 17, Azalea with 

 determinate branches. 18. The English Ivy with 

 radicating tendrils. 19. A voluble stem twining from 

 left to right. 20. A Passion flower climbing by the 

 aid of spiral tendrils. Its leaves are cordate ; its 

 stipules in pairs ; its tendrils axillary : and its radiant 

 nectaries filiform. 21. A scaly stem. 22. The Eng- 

 lish Cowslip with radical leaves, having its flowers 

 on a scape which terminates in a simple umbel. 23. 

 The winged stem of the Thistle with spinous leaves. 

 24. Polypodium vulgare a dorsiferous fern whose 

 stem furnishes an example of the Stipe. 25. An arti- 

 culated stem of the Cactus. 26. Uvularia with a 

 perfoliate leaf. 



Plate III. Fig. 27. Brasenm with a peltate leaf. 

 28. Ovate leaf. 29. Spatulate leaf. 30. A lanceo- 

 late leaf. 31. Dioscorea glauca has cordate leaves 

 which are 9 nerved. 32. Gill has a reniform and 

 crenate leaf. 33. A hastate leaf, 34. A sagittate 

 leaf. 35. An unequal leaf. 36. A sinuate leaf. 

 37. A runcinate leaf. 38. A palmate leaf. 39. A 

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