PLATE VII. 



ESPARTO Macrochloa (Stipa) tenacissima. x 50. 

 Transverse section of leaf. 

 Upper side composed of projecting ribs and deep bays fringed 



with siliceous hairs. Areas of chlorophyll-bearing parenchyma 



interspersed with fibre- vascular bundles. 

 Lower side composed of prosenchymatous fibres. In central 



region of each rib, bands or bridges of thick-walled lignified 



cells extending from lower to upper epidermis. 



