296 



GENERAL MORPHOLOGY OF PLANTS 



soon separate into the separate cells if disturbed. Under proper 

 conditions of temperature and with very free access of air, spore 

 formation takes place. The nucleus of the yeast cell divides into 



Fig. 244. 

 Edible Morel. Morchella esculcnta. The asci, forming hymenium, cover the pitted surface. 



four nuclei and when the protoplasm condenses into three or 

 four small globose shining bodies (fig. 245). The yeast cell 

 with the enclosed spores is regarded as an ascus. The yeast 



