Rosendahl: symplocarpus and lysichiton. 



139 



Text Fig. 1. Transverse diagram of the apex of the rhizome Text Fig. 2. Longitudinal 



of Symplocarpus showing leaf arrangement and position of the diagram of the upper part of 

 . the rhizoma of ^lymplocarpus 



innorescences. showing scheme of branch- 



ing. The successive axes of 

 the sympodium are shown 

 alternately shaded and un- 

 shaded . 



In Symplocarpus the plant begins the season's growth by 

 unfolding two scale leaves and one or two inflorescences. These 

 are followed regularly every year by a number of normal foliage 

 leaves, a fact which must appear clear from the accompanying 

 half-tone photographs. Each axis or renewal shoot bears two 

 leaves, a spathe and an inflorescence (Text-Fig. 2). With 

 the exception of the first renewal shoot of the year which bears 

 only scale leaves, all the others, 2-4 in number, unfold ordinary 

 foliage leaves. (Only once has the writer found a third scale 

 leaf, in which case it was the first leaf of the second renewal 

 shoot.) The scheme of branching is shown in a diagramatic man- 

 ner in Fig. 2. 



In Dr. Krause's monograph the scheme of shoot and leaf 

 sec[uence is given in the following form (Page 141, I.e.) : 



