VI 



CONTENTS. 



EXERCISE PAGE 



XIX. Form of the Receptacle and Insertion of Floral Organs 47 



XX. Polyandrous Stamens 48 



XXI. The Growing together of Stamens . . . .50 



XXII. The Growing together of Carpels . . . -52 



XXIII. Union of Floral Whorls with each other Calyx and 



Pistil 58 



XXIV. The Union of Floral Whorls with each other Corolla 60 

 XXV. Union of Floral Whorls with each other Stamens . 61 



XXVI. The Receptacle 67 



XXVII. Appendages of the Receptacle 69 



CHAPTER FOURTH. COMPARING AND CLASSIFYING 

 PLANTS. 



XXVIII. Plant Characters and Affinities 

 XXIX. How to begin Classification 



72 

 76 



CHAPTER FIFTH. THE MINUTE STUDY OF THE 

 ESSENTIAL ORGANS OF PLANTS. 



XXX. Parts of Stamens 



XXXI. Number and Shape of Anther-Lobes 



XXXII. Dehiscence of the Anther . 



XXXIII. Introrse and Extrorse Anthers . 



' XXXIV. Attachment of Filament to Anther 



XXXV. Forms of Filaments 



XXXVI. Structure and Forms of Pollen . 



XXXVII. Forms of Connective . 



XXXVIII. General Features of Stamens 



81 



82 

 83 

 84 



85 

 87 

 88 



89 

 90 



CHAPTER SIXTH. THE PISTIL. 



XXXIX. Kinds of Style and Stigma . 



XL. Form and Position of Styles 



XLI. Pistil, Ovary, Fruit 



XLII. The Structure of Ovaries . 



XLIII. Placentation 



XLIV. Modes of Dehiscence . . - . 



XLV. Direction of Ovules and Seeds . 



XLVI. Parts of the Ovule . . 



XLVII. Kinds of Ovule ... . . . 



XLVIII. The Composition of Fruit . . 



92 



93 



93 



95 



98 



101 



103 



104 



105 

 106 



