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Fig. 202. Induced apogamv in Doodia caudata (Cav.) R.Br. a. A prothallus bearing an apogamous 

 sporophyte (right) and a sexually produced sporophyte (left). Natural size. From a specimen 

 preserved in alcohol, b, c, d. Different focal levels through one root tip cell of a sexually produced 

 plant from a section, x .500. e, f. Two different focal levels through one root tip cell of aa 

 apogamously produced sister plant to show lower chromosome number, from a section, x 1500. 



199 



