lO 



MYCOLOGY 



Fig. I. — Club-root of cabbage, Plasmodiophora brassica. i, Turnip with club- 

 root; 2, section of cabbage root with parenchyma cells filled with slime mould; 3, 

 isolated parenchyma cell, (») vacuole, (0 oil-drops in Plasmodium, {p) Plasmodium; 

 4, lower cell with Plasmodium, upper cell with spores developing; 5, parenchyma 

 cell with ripe spores; 6, isolated ripe spores; 7, germinating spores; 8, myxamoeba. 

 (Figs. 2-8, cfter Woronin in Soraucr Ilandhuch dcr Pflanzenkrankheiten. 1886, p. 72.) 



