PLATE V. 



FBR.N continued. 



FIG. 1. THE ANTHERIDIUM AND ANTHEROZOIDS OF THE ROYAL FERN (Osmunda Regalis), under surface oi 



prothallus (green). 



FIG. 2. THE ARCHEGONIUM WITH ITS CENTRAL CELL OR GERM-CELL. 

 Fio. 3. DIVISION OF CENTRAL CELL INTO FOUR IN THE BRACKEN. 



FIG. 4. CONNECTION OF YOUNG BRACKEN FERN WITH IT.-J PROTHALLUS BY MEANS OF THE FOOT. 

 FIGS. 5, 6. TRANSVERSE AND LONGITUDINAL SECTIONS OF THE RHIZOME. Showing 

 Sc.i. Outer scleren'chy ma (Gr. skleros, hard; enchnma, tissue). 

 G. T. Ground tissue or paren'chyma (Gr. para, together; enchuma, tissue). 

 F.-V, B. Fibro-vaseular bundles outer. 

 Sc.. Inner sclerenchyma. 

 G. T. Ground tissue. 

 F.- V. B. Fibro-vascular bundles inner. 

 FIG. 7. TRANSVERSE AND LONGITUDINAL SECTIONS OF RHIZOME. Showing 



Epidermis, sub-epidermis, and parenchyma loaded with starch granules. 

 Fibro-vascular bundle with scalariform and spiral vessels. 

 Parenchyma with starch. 



Sclerenchyma very thick walled (Gr. skleros, haul). 

 FIG. 8. PORTION OF FIBEO-VASCULAR BUNDLE. Showing 

 Cells of fibro-vascular bundle sheath. 

 Cells of bast sheath with starch granules. 



f Bast fibres or hard bast. 



BAST OR PHI/EM -j Bast vessels. ) 



( Bast parenchyma or procambium. J 

 f Scalariform vessels. 

 WOOD OR XYLEM < Spiral vessels. 



( Wood parenchyma. 

 Notf. In the complete bundle the bast forms a ring surrounding the wood. 



FIG. 9. PART OF AN OBLIQUE SECTION OF A LEAF-STALK. Showing the scalariform vessels (L. srala, a ladder* 

 of the bundle. 



CLASSIFICATION OF FEBN. 



Kingdom Plan tie. 



Sub-Kingdom Vascular Cryptogams (Gr. kruptos, hidden ; gamos, a marriage). Vascular, 



because they possess fibro-vascular bundles ; cryptogams, because the sexual organs are 



hidden on an inconspicuous prothallus. 

 Class Filiciuae. 

 Order Filicos. 



Oenus Pteris (Gr. pteron, a wing). 

 Species Aquilina (L. aquila, an eagle). 

 Common Name Bracken Fern. 



