INDUCED APOGAMY 



in 1947. The apogamously produced plants (Fig. 204) are still somewhat smaller than 

 their sexual sisters (Fig. 203), though this is only apparent on fairly close inspection. On 

 a casual glance the two types of plant are far more alike when mature than when young, 

 and without their labels they would be difficult to distinguish apart. 



Fig. 204. Living leaves of an apogamously produced plant 

 oi^ Doodia caudata {Cav.) R.Bt. Natural size. 



This close resemblance applies not only to the plants as a whole but also, somewhat 

 surprisingly, to their sporangia and spores. As may be seen from Fig. 205, the sporangia 

 of both are well filled with normal-looking spores, the only obvious difference being that 

 those of the apogamous plant are smaller in size. Somewhat disappointingly, however, 

 the spores of the apogamous plant have so far proved incapable of germination in spite 



201 



