56 WATER-LILIES 



With the mud clinging to them they show no 

 differences. But most of the stellata type, 

 such as N ymphcBa ccerulea, have a central 

 crown only, while others have one large and 

 a varying number of smaller tubers. These 

 mature during the next month or so, finally 

 going into a dormant condition. Many of 

 the stellata type produce tubers very sparingly 

 and it is often necessary to retain the old 

 rhizome. This old rhizome, however, has a 

 tendency to rot during the winter when 

 placed under the greenhouse bench, to pre- 

 vent which it must be kept in a growing con- 

 dition. This is best accomplished by potting 

 it into a 7-inch pot, which is then submerged 

 in a tank in the greenhouse, only a slight 

 covering of water being essential. By the 

 next spring the plant will be found ready to 

 make a vigorous growth. 



SORTING OVER THE STOCK 



About the middle of January look over 

 the collection to see what can be saved and 



