XIX] 



BULL NUT 



247 



FIG. 160. Trapa natans, L. i, L.S. through seed (Enlarged); Co l , the larger and 

 Co 2 the smaller cotyledon; St, stalk of larger cotyledon. 2 and 3, seedlings (Re- 

 duced) ; A, shoot arising in axil of smaller cotyledon; W , roots arising in the region 

 of the leaf insertions. [Goebel, K. (1891-1893).] 



