22s 



THE AMERICAN NATURALIST [Vol. XLVIII 



differences can be noted. A single exception perhaps may 

 be made to this statement. It had been noted that speci- 

 mens of arachnoidea frequently showed fasciation. This 

 fasciation seems most marked in plants of the zygotic 

 constitution BBNN (Figs. 19, 20, 21). 



While it is hoped that later a more extended report may 

 be made upon this plant, at present it may be stated that 

 there exists the probability that it may throw some light 

 upon the nature of fasciations. In earlier publications 19 

 I have brought together some of the known facts bearing 

 upon this teratological character. Though a large por- 



i» "Fasciation in Oxalis crenata ami Exper imental Production of Fascia- 

 tions," Rep. Mo. Bot. Gard., 17: 147, 1906; "Fasciations of Known 

 Causation," American Naturalist, 42: 81, 1908; "Inheritance of Fascia- 

 tion in Zea Mays," The Plant World, 14: 1911; "The Origin of Species 



' Frondescence and 



Fasciation," Plai 



rid, 14: 1911; "Fasciation in Oxalis ere) 



