12 CONTENTS. 



PAGE 



CHAP. III. THE STAMENS 69 



Ex. 18. Parts of Stamens 69 



19. Number and Shape of Anther-Lobes 71 



20. Dehiscence of Anther 73 



21. Introrse and Extrorse Anthers 74 



22. Attachment of Filament and Anther 76 



23. Forms of Filaments 78 



24. Structure and Forms of Pollen 79 



25. Forms of Connective 81 



26. General Features of Stamens. . . 83 



CHAP. IV. THE PISTIL 85 



Ex. 27. Kinds of Stigma 85 



28. Form and Position of Styles 86 



29. Kinds of Pistil 86 



80. Structure of Ovaries 87 



81. Placentation 91 



32. Modes of Dehiscence 94 



33. Direction of Ovules and Seeds 97 



34. Parts of the Ovule 98 



35. Kinds of Ovule 100 



CHAP. V. THE FRUIT AND SEED 102 



Ex. 36. The Composition of Fruit 102 



37. Parts of the Pericarp 104 



38. The Classification of Fruit 106 



39. The Seed. Its Form and Surface 113 



40. Position of the Embryo in Seeds 115 



CHAP. VI FLORAL SYMMETRY, PHYLLOTAXY, PREFO- 



LIATION, CYMOSE INFLORESCENCE, ETC... 119 



Ex. 41. Numerical Plan of the Flower 119 



42. Alternation of Parts in Flowers 120 



43. Leaf Arrangement. Phyllotaxis 122 



44. Arrangement of Floral Leaves in the Bud. ^Estiva- 



tion, or Prsefloration 128 



45. Cymose, or Definite Inflorescence 132 



46. Duration of Floral Envelops 137 



47. Surfaces . . .138 



