138 



Postscript. 



When working upon the Pirolacece W. Rommel's paper 

 Anatomische Untersuchungen über die Gruppen der 

 Piroleæ und Clethraceæ, Heidelberg, 1898, escaped my 

 attention ; in it the anatomy of the Pirolacece is treated of, 

 especially that of the stem and root. That paper would not, 

 however, have influenced my treatment of the species in ques- 

 tion, as the exclusively biological point of view which I have 

 adopted in the present paper required an independent, fresh 

 description. But Rommel's paper should be mentioned here. 

 For the sake of uniformity ( give here the respective pages in 

 Rommel's paper: — Pir. rotundifoUa, p. 19, Pir. minor, p. M, 

 Pir. secunda, p. 22, Chimophila nmbellata, p. 28. 



30—6—1908. 



