WEEDING AND UPKEEP 79 



These may be termed succulents. In this class are 

 included Nanda, in two species, and Bwanda. 

 They are all dicotyledons. 



The third class consists of those weeds which, 

 besides seeding, propagate themselves by under- 

 ground rhizomes or stems, extending from the 

 parent plant in all directions, and forming new 

 plants. In this class are Lumbugu, Nku, and 

 Lusanke. They are all monocotyledons and 

 grasses, and may be termed couch-grasses, 

 although none of them are exactly what is known 

 by that term in England. 



Plans to be adopted to keep weeds in check. 

 The weeds are all alike in that they will propagate 

 by seed; so that weeding should be at such short 

 intervals that perfection of seed is impossible. 

 The shortest period in which seedling weeds can 

 grow up and ripen their seeds is about a month. 

 The " Kuku " grass and " Sere " will ripen seeds 

 in this period, both often flowering whilst only in 

 the seedling stage. Weeding should therefore be 

 done at intervals of not more than three weeks. 



With the annuals, this is all that has to be con- 

 sidered, for the weed once dug up soon dies, and it 

 can be either left on the surface of the ground or 



