506 



TJic Inconstancy of Fasciatcd Races. 



been described and figured by Caspary and therefore 

 appear to be fairly abundant in this species.^ 



In perennial weeds fasciations also occur freely, and 

 here we may often observe that the phenomenon is re- 

 peated more or less regularly in successive years on the 

 same specimens or groups of specimens. For instance, 

 we have in the botanical gardens at Amsterdam a plant 

 of Sonchus pahistris on which I first observed a splendid 



tall broadened stem in 1890. 

 Since then the plant has pro- 

 duced almost every year one 

 or several such structures, 

 sometimes 2 meters in height, 

 sometimes not more than 1 

 meter,and attaining a breadth 

 of 6 centimeters by a thick- 

 ness of 1. These stems are 

 cylindrical at the level of the 

 ground, but flatten out grad- 

 ually upw^ards. 



Similar instances were 

 afforded by Aconituui Xa- 

 pcllus, and Hclianthus tubc- 

 rosns (Fig. 113) in our gar- 

 den, by Jiisticia siipcrha in 

 the greenhouse, and l)y Agri- 

 mania Eiipatoriiim and Chrysanthemum Leiicanthenuini 

 in the field. I frequently observed fasciations in annual 

 and biennial species, and usually in the course of several 

 years in the same locality; for instance in Raphaniis 



R. Caspary, Eiiie gehandcrte Wiirzel von Spiraea sorhifolia L., 

 Schriften d. Physik. Oec. Ges. Konigsberg, 1878, XIX, p. 149. Plate 

 IV. As a matter of fact, however, it was not a root; see Pexzig, 

 Teratologic, I, p. 421. 



Fig. 114. Plantago lanceolata. 

 Ears which have spHt one, 

 two or three times. Cultures 

 of 1894 and 1895. 



