Altinpia. 'fhouvenin(13) dos^ribed the structure of the 

 root, stein, and leaves ol" various iri'^mbers ol' the family. 

 The account f^ivon by Niedenzu in F,n,";ler and Prantl's 

 Pflanzenfamilien is the most complete I have seen. 



In some American oaks, v/hich require two years to 

 mature seed, it has been found that fertilization takes 

 place about a year after pollination. The statement is 

 made by Goebel(15) on par^e 392, that t4=iis period of 

 /•est occurs after the pollen tube has reached the em- 

 bryo-sac in Ulmus , Quercus , Fagus , .Tuglans , Citrus, 

 Aesculus , Acer, Cornus, and Robinia. As r':iss Benson(4) 

 points out, this statement is misleading in the case of 

 British Amentif erae. It does not fit Hamamelis. 



In Colchicum autumnal e , according to Hofmeister 

 (7), t}ie pollen tube reaches the embryo-sac at the 

 latest by the beginning of November, and it is not un- 

 til the May of the next year that the embryo begins to 

 form. Colchicum autiunnale and the autumnal species 



