248 



Explanation of Plates. 



PLATE XLIII. 



{AU Figures x 500 unless otherwise stated.) 



SOROSPORIUM SOLIDUM. 



Fig. 



131. Inflorescence of ScJioenus imberbis affected with S. solidum 



132. Section through ovary affected with same 



133. Portion of same enlarged 



134. Young spore-balls of same treated with caustic potash 



135. Mature spore-balls 



136. Spore-balls partially broken up, showing the so-called, sterile cells. 



X -25 

 X 100 

 X 2o0 

 X 250 



