134 T. Holm — Isojjijrum biternatum. 



Ep. 



they are densely crowded and very thick in I. stipitatum Gr. ; 

 in I. FaurieA Francb. and I. tr achy sper mum Maxim, the 

 rhizome is slender, but very short, and the roots are almost 

 capillary. Very characteristic is the rhizome of I. adoxoides 

 D.C. ; in young specimens the root consists merely of a short 



