PLATE V. 



FBR.N continued. 



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



prothallus (green). 



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

 FIG. 3. DIVISION OP CENTRAL CELL INTO FOUR IN THE BRACKEN. 



FIG. 4. CONNECTION OF YOUNG BRACKEN FERN WITH ITS PEOTHALLUS BY MEANS OF THE FOOT. 

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



Se. i. Outer scleren chyma (Gr. slderos, hard; enehuma, tissue). 



G. T. Ground tissue or paren chyma (Gr. para, together ; enehuma, tissue). 



F.- V. 13. Fibro-vascular bundles outer. 



Sc.. Inner sclerencliyma. 



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. 



Sclerencliyma very thick walled (Gr. skleros, hard). 

 FIG. 8. PORTION OF FIBRO-VASCULAU BUNDLE. Showing 



Cells of fibro-vascular bundle sheath. 



Cells of bast sheath with starch granules. 



( Bast fibres or hard bast. 



BAST OR PHIAEM ; Bast vessels. ] 



( Bast parenchyma or procambium. j 

 1 Scalariform vessels. 



WOOD OR XYLEM &amp;lt; Spiral vessels. 



( Wood parenchyma. 

 Note. 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 scalarifonu vessels (L. srala, a ladder^ 

 of the bundle. 



CLASSIFICATION OF FERN. 



Kingdom Plante. 



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 Filicinse. 

 Order Filices. 



Genm Pteris (Gr. pferon, a wing). 

 Species Aquilina (L. aquila, an eagle). 

 Common Name Bracken Fern. 



