Plintoiiiicroi^rnphs of Botiniiciil Sfmlli s 



33 



44.--T.S. Stem " Hippuris vulgaris," Mare's-tail (Aquatic type). 



^,S__Vi « " V~ Epidermis. 



,'- ^ai ■w^*'~^v^'-^ "k '■ ■ ^1 Cortical tissue. 







Phloem of bundle. 

 Xylem (wood). 

 Central axis. 



45, "L.S. Stem, "Hippuris vulgaris," Mare's-tail 



Growing point. 

 Developing leaves. 



Central axis. 



Leaf. 



Flower Bud in leaf axis. 



Nodal diaphragm. 



